If anyone is looking for a Starhawk Beta code, They're still about in various places.
Pre-release (and some retail releases) of Uncharted 3 came with a Public Beta code. Just punch in the code and download it from PSN.
I'm *led* to believe that PSN Plus members can ALSO download the Starhawk Beta for free.
You may also be able to get one here on the Playstation forums (linky)
Or if all else fails, try here: