I've been working on the Gatekeeper Valley on Cadia that the Imperial Cadian 1st Gatekeepers protect and are based at as part of the overall fluff. I plan to use the valley as a background for various web postings and such for the web site.
I'm creating it using
L3DT which has an awesome manual terrain drawing and manipulation tool. I put up a short shakey video on YouTube to show my progress. I've posted the drawing its based on before on the forum.
After finishing drawing the terrain, I'll run the heightmap I create through
Terragen 2 to generate very nice pictures of it rendered in a realistic setting.