BTW -- the article that started me wondering:
http://www.mlbtraderumors.com/2009/12/as-royals-had-failed-talks-for-callaspo.html
What I come away from that with is that Beane probably saw a sign that Moore might be underappreciating Callaspo with the acquisition of Getz, made a lowball offer, got countered, and tried and failed to bring Moore off his price. What I don't know is what that price is, and whether the Sox might be in a better position to meet it than the A's are.
If the Sox are prepared to play Pedroia at SS if need be, that gives us a potential opening at 2B. Callaspo isn't the best 2B in history, but he hits so that's OK and he might improve a bit in his second full year at the position. If he's too bad though, well, Lowell's contract ends next year, so we can maybe salvage it by sliding Pedroia back over, putting Callaspo at third, and finding another noodlebat SS -- or even promoting Lowrie, if he's had some better news on his health lately, and playing him at 2B or SS with Pedroia at the other position.
Point is, after this year we have some possibilities, and Callaspo would be a good fit for a number of options depending on how he performs. arguably a better fit long-term than guys like Polanco and Hudson.