Bethesda Softworks has confirmed with Gamasutra
that id Software has indeed let some people go. The details of how many aren't known, but there are indeed a few less people at the Dallas company.
Peter Hines, VP of marketing and PR for Bethesda, did say that id is still hiring so this could just be a round of contractors who aren't renewed and they're looking for a new batch of folks to fill in. I'm currently working in that capacity myself where my contract is on a six month basis and gets renewed at the company's digression.
They're going to need some folks though as they're currently working on Doom 4
didn't do too bad and Jeremy liked it, but I've yet to play it myself. It's the only id game that I haven't been excited about.