http://www.proflightsimulator.com/?hopc2s=secure1
Just got a promotional email about this. Looks interesting but my biggest questions would be addonability - and open source.
If they control everything and hand out what they create - personally I loose a lot of interest.
However - this may be the next big one?? (If you ask me this is the kind of thing FS* should have been)
Realise this is a promo and shortcomings will come from users over time. Remember 'Flight' looked promising - proved to be very much otherwise ...
This DOES look pretty good though