Leading up to the release of Quake 1/2/3 I was forever on Blues checking for .plan updates and so on but this time around, based largely upon JC's lack of public posting a while back, I stopped checking. Now Doom3's release is imminent I'm obviously hankering after getting my hands on a copy to put it mildly!

Does anyone have any idea of what the system requirements are going to look like?

I know I need to upgrade my graphics card, preferably with a sub £100 card but I'm not in a position to do a massive PC upgrade. Here's what I have at the moment:
P4 2.53GHz
1GB PC2100
GeForce 4 MX 420
Win XP

Am I likely to get away with this or am I SOL?