A lot of you who aren't loading are stalling/crashing when the shaders are being loaded. Here's the fix for you. (this doesn't mean all of you are fixed!)
Navigate to C:\Program Files (x86)\Steam\steamapps\common\red orchestra 2\ROGame\CookedPC
There should be a load of .u, .upk, and other assorted files. Delete the files that aren't in folders (leave the folders alone!)
Then go into steam and validate the RO2 game cache. This will re-download those files.
I have faith in TWI fixing the crash issue, but i feel they may lose a few customers along the way.
I've gone from being able to play the game (although appalling fps/stutters/slowdowns etc) to now not being able to play at all, just crash at options menu.
Frustrating to say the least
The lack of communication is somewhat surprising.
*oh and reinstalled several times!!