Some things out there to check out...
John Sickels has his Detroit Tigers top 20 list up...pretty barren, after all the trades, with only 1 B+ prospect (Rick Porcello), and two B-s (Jeff Larish and Danny Worth)...
On the other hand, Sickels says in the top 20 for Cincy that the Reds have a strong, deep system, with what I'm guessing he'd deem one of the 2 or 3 top systems in baseball.
And Kevin Goldstein runs down the A's top 11 prospects at BP, with Daric Barton getting 5 stars, Trevor Cahill getting 4 stars, and the rest being three stars or lower...