It appears that the cap increase for Uncharted 3 Beta will not be happening like everyone hoped it would be.
It was reported during last week PS Blog post that Uncharted 3 would be receiving some new maps along with a level cap increase. Sadly Naughty Dog Community Moderator has come out and stated a correction to this:
There was some miscommunication and a blog post was authored which mentioned that there would be an increase in the level cap along with new maps.
The new maps will still be deployed later today, but there will be no level cap increase during the Subway/Uncharted 3 Multiplayer Experience. Sorry for the confusion, hope this clears things up.