So, since BKportal has gone down, it has gotten hard to find stuff

I'll start with a link to all the Mission: Barbarossa patches, including the super hard to find environment patch

http://blitzsrbija.proboards.com/thread/31/mission-barbarossa-patches

http://www.solvangnet.com/bk/random/random.html

Solvang's random map mod - it expands the base Blitzkrieg 1 campaign, makes the random maps far larger, and is in general one of the best mods for the base game

http://bkpforums.com/phpBB2/viewtopic.php?f=23&t=4195

For anyone needing more resolution options in blitzkrieg

I found a Spanish blogspot with tons of links: blitzkriegesp.blogspot.com/ I use chrome to auto-translate the page.