According to Rosenthal it's Blake for Class A catcher Carlos Santana and P John Meloan.

So what can Dodgers Fan tell us about the guys they are sending to Cleveland?   It looks like Meloan was starting to develop as a reliever and then they moved him to the rotation this year.  As for Santana, it looks like he was pushed from Rookie ball to hi A in '06 and he did ok.  Then in 07 they put him at A and he struggled, while playing 3B & OF.  This year, it looks like they've got him at catcher and his eye has improved, as well as his power & contact.

Any additional insight?

http://msn.foxsports.com/mlb/story/8381628/Sources:-Dodgers-near-deal-for-Tribe-3B-Blake