Quick one, I saw this thread on Warseer, some truly awesome terrain and 10 pages worth [so it makes up for the short post :) ]. I particularly like the Dawn of War Sentry Turret and the Atmosphere Processors. Loads of extra details to make them more realistic and step-by-step guides to do-it-yourself



Check it out:
http://www.warseer.com/forums/showthread.php?250009-Bunkers-barricades-and-battlefield-bits