Say bye-bye to another Melrose Place vixen. Jamie Luner (below),

LUNER ORBIT

who steamed up the screen in the WB's Savannah before moving over to Melrose as bad-girl Lexi Sterling, has signed a development deal with the WB to do a new show, meaning her days at MP are coming to a close. No decision yet on whether it'll be a drama or a sitcom, but Luner is psyched about moving on. "I don't want to burn any bridges," she says. "They've been so good to me here. I said, 'If it doesn't work out, can I still come back and have my old job?'" Meanwhile, insiders say chances are better than even that Heather Locklear and company will be back on Fox for an eighth season next year. Who woulda figured?