Raven's Wolfenstein update just got system requirements, courtesy of an id poster on the game's boards.
And here they are. We're still waiting for a solid date, but you should be playing this next month at the latest.
Microsoft(R) Windows(R) XP or Windows Vista(R) (Windows 95/98/ME/2000 are unsupported)
Microsoft DirectX(R) 9.0c (included & required for Windows XP & Vista)
CPU: Intel(R) Pentium(R) 4 3.2 GHz or AMD Athlon(TM) 64 3400+ processor
RAM: 1GB RAM
Video Card: 256MB NVIDIA(R) Geforce(R) 6800 GT or ATI Radeon(TM) X800
Sound Card: 100% DirectX 9.0c compatible sound card
HDD Space: 8GB (Plus an additional 800MB for Windows swap file)
Media: 100% Microsoft Windows compatible DVD-ROM drive
Internet: Broadband connection and service required for multiplayer