Blizzard Support now offers system requirements for the
StarCraft II beta, Blizzard's upcoming RTS sequel (thanks nin and
Kotaku). The requirements are pretty modest, with the recommended specs calling for an Intel Pentium D or AMD 64 X2 CPU, one to two GB of RAM, and a "3D graphics processor with Vertex and Pixel Shader capability with 128 MB VRAM such as an ATI Radeon X1600 or NVIDIA GeForce 7600 GT class card or better."
Update: It turns out these specifications were not accurate, see
this story for details.