Check out Pat from WHYGAVS's post from August on whether or not Jason Bay is clutch. It is well written with solid research.
EDIT-10/10/2006: Also, Charlie at Bucs Dugout has some additional input on the matter in his 2006 review of Bay.
Cory at Pirates Generation has a look into the 2007 Pirates. It's a nice breakdown of the roster and possibilities to improve it.
The Post-Gazette has a look back at the 2006 Pirates and a look forward to the 2007 Pirates.
Stats Geek also had a live chat yesterday that you should check out.
I apologize for linking to some older posts, but this blog is in its infant stage and I read some interesting items before it began.