The Teixeira talk IS beating a dead horse. Go ahead and beat it if you want (that's what she said), but it isn't going to change anything or address the current needs. I was a big fan of getting Teixeira and agree that it was a pivotal moment.
As far as getting a middle-order bat goes, I think the Sox will make a move and that Buchholz is a likely piece. I wouldn't be shocked if Ellsbury were as well. They have good pitching depth without Buchholz and great young OF depth with a current CF in Cameron. They could definitely be okay with Hermida and Reddick with Kalish, Lin, etc., coming up.
I'm not convinced that Gonzalez is the only guy they can get, and I'm also not convinced that making that moves assures them of any success in 2010. The move they make for a big bat needs to be with the future in mind, not trying to salvage one season when the cards may already be against them.
I'm always an optimist, and the way the Sox pummeled the Yankees at the beginning of the year last year should be a reminder of why there is still hope for this team (i.e., the Yankees looked really bad and won the whole thing). That said, this team has serious flaws that-as Kilo pointed out--makes them really not fun to watch.