Seems like Lucasarts may have something truly promising coming around this time. The game is a realtime strategy game that resembles somewhat of a mixture between "StarWars: Rebellion" and "C&C: Generals" and takes place a few years before ANH. If you don't shun a 750MB download, you can check out the demo and play through five tutorial missions and one galactic conquest mission.

Here are the required system specs:

Supported Operating Systems
To be able to play the STAR WARS: EMPIRE AT WAR Demo, you must have Windows 2000 or XP installed and configured correctly, and your computer hardware must be DirectX 9.0c compatible.

Minimum System Requirements
Computer Required: 100% DirectX 9.0c compatible computer

CPU
Required: Intel Pentium 1.0 GHz or AMD Athlon 1.0 GHz
Recommended: Intel Pentium 4 2.0 GHz or AMD Athlon XP 2.0 GHz

Memory
Required: 256 MB RAM
Recommended: 512 MB RAM

Graphics Card
Required: 32 MB 3D Graphics card with Hardware Transform and Lighting (T&L) Capability
Recommended: 64 MB 3D Graphics card with Hardware Vertex and Pixel Shader (VS/PS) Capability

Sound Card
Required: 100% DirectX 9.0c compatible PCI, USB, or Onboard Audio Device

Game Homepage
Download Link #1
Download Link #2
Download Link #3