This LucasArts Press Release features more details on Star Wars Battlefront, the upcoming PC, PS2, and Xbox third-person shooter. They've also posted some screenshots on the product page. Here's a bit from the announcement:

Both console and PC players will be able to participate in the most memorable Star Wars battles set in over 15 environments across 10 diverse planets including Hoth, Geonosis, Yavin, Tatooine and Naboo. Players will be able to select one of over 20 different soldier types from four factions: Rebel Alliance, Imperial Army, Clone Army and Droid Army. Each soldier will have specialized abilities and the freedom to use ground-based turrets found on the battlefront as well as over 15 diverse ground and air vehicles including the AT-ST, X-wing and speeder bike.