IGN's starting a strategy guide on their site. Currently the only thing up is an incomplete (and yet still confusing) diagram of transitions on the ground.
http://guides.ign.com/guides/876973/page_8.html
Looks like judokas have a sweep to get out from someone's open guard and into side control (assuming I'm reading that right, which is a big assumption). They've also got an escape out of full mount to standing.
The guide is very incomplete, but it might be worth keeping an eye on as we wait for the game to come out.
