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WXPN (88.5) is giving its overworked

David Dye

a break, so modern-rock guru

Jim McGuinn

will take over part of his afternoon show.

Effective next week, Dye's long-running World Cafe program will cut down to two hours, till 4 p.m., Mondays through Thursdays. The station says Dye will focus more on the national version of the show.

"Nobody nationally can believe he does an on-air shift, too," says general manager Roger LaMay. "Just [Friday], he had to cut an interview short to get back" on the air.

McGuinn, who programmed the former stations WDRE and Y100, will be heard on the "adult album alternative" station from 4 to 7 p.m. Mondays through Thursdays. Dye will continue to work Fridays - first with World Cafe (2 to 4 p.m.) and then Funky Friday (4 to 7 p.m.).

McGuinn will adhere to the usual XPN playlist, says LaMay.

McGuinn joined XPN in August as program director and host of Y-Rock On XPN, an alternative format heard 24 hours on the Internet and three nights a week over the air. McGuinn will continue as its program director, but will give up hosting to Josh Landau and Joey Odorisio, LaMay says.

Elsewhere in radio:

More upheaval at sports-talk WPEN (950) as program director/morning host Gregg Henson departed Thursday for his hometown of Detroit after nine months; his predecessor had lasted three. Fox29 sports guy Don Tollefson filled in for Henson on Friday's show with Glenn Foley, Meredith Marakovits and Jon Marks. Henson didn't return calls. Reached Friday, Tolly said he'd "absolutely love" the morning job permanently, if Fox would let him do it. Tollefson, who hosts a Saturday show on WPEN, is high on the station because it backs his charity work. Meanwhile, WPEN station manager Bob DeBlois is looking for a morning host (one possibility: contributor Michael Bradley), a program director and, while he's at it, a sales manager.

Paul Gluck

indeed will bow out of the station manager's job at WHYY at the end of May to head Drexel University's Kal and Lucille Rudman Institute for Entertainment Industry Studies. The move will get Gluck, 53, a TV vet who previously ran newsrooms at Channels 3 and 10, back in the classroom. (He has taught at Temple and La Salle.) Gluck calls the Rudman job - leading Drexel's vaunted TV station, DUTV - a "grand opportunity" and "a new challenge."

When MSNBC's

Chris Matthews

comes home next month to speak at Villanova's commencement, he'll tell the berobed and mortarboarded Wildcats about the teacher who changed his life:

Gerald Tremblay, his English teacher and school-newspaper adviser at La Salle College High - who happens to be a 'Nova grad (1957).

"He had a lot to do with me," says Matthews, who graduated from La Salle in '63 and went on to the College of the Holy Cross. "The most important thing was he got me involved in writing." Tremblay also took Matthews' class to New York. "That whole cultural thing seems so normal, but to me it was a big new world opening up," Matthews says.

Tremblay, who taught at La Salle from 1957 to 1977 and is now a psychotherapist in Montgomery County, remembers Matthews as a "quick thinker."

Casting call for CBS's

Big Brother

, searching for houseguests: noon to 3 p.m. Wednesday at Chickie's & Pete's, 1526 Packer Ave. See

» READ MORE: www.cbs3.com

for info.

MTV's The Real World will talk to 18- to 24-year-olds from 10 a.m. to 5 p.m. April 21 at O'Neal's Pub, 611 S. Third St. Bring a nonreturnable photo and photo ID. Host city has not been announced.

The Pennsylvania Academy of the Fine Arts is looking for a Thomas Eakins impressionist to bring the 19th-century painter to life in PAFA-sponsored events. (PAFA, the Art Museum and private donors recently paid $68 million for Eakins' The Gross Clinic to keep Thomas Jefferson University from selling it down South.) For the open audition - 2 p.m. Tuesday at PAFA (Broad and Cherry Streets) - prospects will be asked to present a monologue as the painter, "teach" a painting class to the audience, and endure a fast-paced Q&A by Eakins experts. Among judges will be Ben Franklin impressionist Ralph Archbold. Questions go to Sarah Promisloff at 215-564-3200, Ext. 21.

Big week for

Tigre Hill's

film

The Shame of a City

, which chronicles the buggy 2003 mayoral election.

Shame

comes out on DVD Tuesday, and the local blog Philebrity.com will host a free screening and Q&A session at the Trocadero on Arch Street at 7 p.m. Wednesday. The DVD contains extras, including FBI wiretaps of

Mayor Street

friend

Ron White's

cell phone.

Fox29 traffic reporter Dorothy Krysiuk says back pain from an injury has kept her off the air lately. Krysiuk says she wants to get back to calling the jams but wouldn't say when - or how she was injured. According to Philadelphia court records, she was plaintiff last year in a lawsuit related to an auto accident in which another motorist hit her car.

Former New Jersey Gov. Jim McGreevey had lunch - kobe beef burgers, fries and soft drinks - with an unidentified man Thursday at Bootsie's on 19th Street near Market. McGreevey had hair sprouting on his chin, my source says. A beard?

Philly-bred DJ King Britt returned to his house-music roots Wednesday night at Fluid nightclub. Paperstreet hosted the release party for Britt's new album, Deep & Sexy 4. The Digable Planets alum, who helped score last year's Miami Vice movie, has come a long way from the old Tower Records on South Street, where he was dance-music buyer.

Holland native

Shannon O'Brien

, 20, is on newsstands as Playboy's Miss May, billed as

Shannon James

in an eight-page pictorial. (One shot shows her in a Phillies shirt, holding a bat. Love the hometown pride.) James/O'Brien, a 2005 Council Rock South grad, says she quit her sorority at the University of Central Florida over pressure from her sisters after she was selected to be photographed last year. (A friend had sent bikini shots to radio host

Howard Stern

.) Reaction from friends and family has been "mostly positive," says O'Brien, who waitresses at the Hooters in Mercer Mall, writes poetry, likes great smiles, and is taking online college courses. She adds that her boyfriend - "I met him when I was going through all this" - understands.