Cool thing about New Vegas - it's being made by much of the team that made Fallout & Fallout 2 (who were not involved with 3), but with Bethesda's Fallout 3 engine. I'm quite looking forward to it.
Oh, and for anyone who's interested in Fallout 3 on PC - I've heard it crashes waaay too often. Just a heads-up. (I haven't tried it, personally - I have the GOTY Edition for PS3.)