RUNNING OFF THE RUNWAY?: Should there be another season of "Project Runway"? Depends on who you ask. Judge and mentor Tim Gunn, of course, believes the show has infinite life. "Independent of my old age, I think the show could go on forever," Gunn said at a viewing party in TriBeCa Wednesday night for the show's finale.

But past contestants at the party believe the show's producers should come up with a new formula. "Personally, watching it, they need to change the format or something to refresh the love people have for the show," said finalist Jillian Lewis, who felt the show could last, "maybe another season or two. I love the show, but now it feels it's easier to predict what's going to happen."

Even this season's winner, Christian Siriano, believes "Project Runway" needs a new project. "This was a really hard season to beat, and I'm kinda worried about next season, because I feel like it'll be compared to our season," he said. "I'm thinking they need to change it up, but I don't want them to change it for the better 'cause then I'll be jealous." Bravo is currently casting for season five's contestants.

And what next for this season's winner? Siriano's winning line may be showing up at Henri Bendel or selling on his Web site — "that is, unless Victoria [Beckham] buys the whole collection, which she very well might," the designer said of Posh, who guest judged on the finale and publicly declared she would like to wear his clothing. Siriano said he has an appointment to meet with Beckham next week. "It's all the prize I needed — though winning was fierce, too."

If the former Spice Girl doesn't claim the whole 12-piece collection for her own, Siriano plans to take special orders, including for "more sellable pieces" on his Web site, on which pieces will retail from $200 to $2,000. He also plans to create a separate line for Bluefly.com, a sponsor of the show, but that's not the final destination for the 22-year-old. "The line I showed at fashion week, I don't know if it's for the Bluefly customer — I would rather have it at Bergdorf and Barneys," he said.