It slipped past my radar unnoticed until now, but last week NCSoft and Destination Games announced that they're accepting applications for closed beta testing of Tabula Rasa.
The beta signup page can be found here. Minimum specs are as follows:
Windows® 2000/XP/Vista
512 MB System RAM
2.5 GHz Intel® Pentium® 4 or equivalent AMD™ processor
128 MB Direct3D and Shader 2.0 compatible video card and DirectX 9.0 compatible driver
8x DVD-ROM drive
4.6 GB free hard disk space
DirectX 9.0c
DirectX 8.1 compatible sound card
Keyboard, Mouse
Broadband Internet connection
Those with Core 2 Duo processors should probably list their processor as "Pentium Dual Core", as since Pentium D has its own spot in the list I think that's the listing they meant for the Core 2 Duo.