Please check our newest SDK that works with the latest SF version:
http://www.theoworlds.com/theobuilder.php

Here is the latest chat built with it:
http://www.theoworlds.com/theochat/

Last week we released the newest version of our Flash isometric engine, that we've been developing for over 5 years:

http://www.theoworlds.com/theobuilder.php

It supports many new features like 8-directions movement, elevations, tile layering and furniture stacking, character collision and more ...

Actually there is a new SDK available now:
http://www.theoworlds.com/blog/2009/04/ ... eased.html

Works with latest SF.