The ever busy Thieve's Guild staff has come up with a downloadable skill previously only available for folks who preordered NWN 2, Mystra's Blessing. Here's what they said:
This is a special feat, one of three, that was available to those who pre-ordered the game. You must install the files, then start a new game in order to get the feat. It won't work in a game your already playing.
You can download the feat at the link above.