Uncharted 2: Among Thieves is getting bug fixes for the multiplayer beta.
One of the fixes will stop the PS3 from automatically restarting once the beta is exited out of, and the matchmaking problem will be fixed as well.
The limits on Deatmatch have been raised from 25 to 50 and the looting limit has gone from 3 to 5, both of which helps extend the play time.
Great news if you play the beta.
More over on PS3-sense.