Peter Gammons says that reasons Peavy might decline the trade would be the hitter's park of Cellular Field, and pitching in the American league. Also, playing for Ozzie Guillen may be a concern.
Scott Linebrink, a White Sock and former teammate of Peavy's says he doesn't think the NL/AL switch is as big of a deal as it was believed to be.
I don't really want to see Peavy in the AL, but he's not going to Boston, Tampa, Baltimore, or Toronto...so that's good. And seems like Chicago's giving up some pretty good prospects for him, so hopefully it'll be a bust of a deal and the White Sox will regret it...or they could have one of the best 1-2 punches in baseball with Peavy and Buerhle. We shall see...
Update: Peavy did not approve the trade to the White Sox.