Briosafreak informed me of an IRC channel for Fallout 3 on the ChatSpike server - the same server that hosts #morrowind, where the Bethesda developers visit and the Elderscrolls fans gather to talk about whatever it is Elderscrolls fans like talking about.
There is also the long standing #fallout channel on Gamesurge which has been around for years and is where most of the Fallout community gather (and if any Bethesda developers are reading, that's where you go should you want to talk to the hardcore fanbase), but I thought I'd let you know about this new channel. If you're ever going to bump into a Bethesda developer whom you can harrass about TURN BASED COMBAT, KEEPING THE GAME PC ONLY, SPECIAL and the traditional TOP DOWN VIEWPOINT, it would be in there.