LDraw.org Discussion Forums

Not LDraw based (yet), but pretty interesting: http://www.mecabricks.com/en/workshop/
See also discussion on Eurobricks

Awesome, thanks for the heads up. What a great idea though, can cater to almost any operating system.

I just saw that Brickset uses the models from that file. But so far i could not see any possibility to save the models on my system.