Here are two conversions I've found:
Goober4473's Incarnum conversion is very ambitious, he has converted all Incarnum classes and races. It's not bad, it's a little wordy, but there are some nice ideas there. Basically, selecting a soulmeld locks you into certain encounter and daily attack powers, but there's a lot of jargon that can be a little intimidating. This attempt was also early in 4e's history, the Incarnate is a dual-stat attacker.
