http://www.alice.org/community/showthread.php?t=10167
Check out the Mario world I worked on. The gravity on it worked pretty well, I implemented a few different techniques to get a pretty solid working gravity.
If you are stuck on a project, check out the tutorials I made here at this link:
http://alice.org/community/showthread.php?p=36778#post36778
There are lots of tutorials on it so far, including some youtube videos, check it out
Or..
Go to my youtube channel to check out my alice 2.2 tutorials I have there..
http://www.youtube.com/user/sfunk1992?feature=mhsn