When on the ground, side roll (1 for rolling into the screen, or d+1 for rolling out of the screen) is a pretty good option. It avoids some of the attacks such as Feng's f,f+3 or Asuka's 3+4. In addition you can hold d after the roll to stay on the ground.
You can only roll once though, unless you are hit on the ground afterward, which will allow you to roll again. :)
[ 本帖最后由 NoodleHead 于 2009-5-19 01:54 编辑 ]
Helping promote world overpopulation since 1980. :lol