A Centrist Senate?

Matthew Yglesias had a very interesting post the other day:

It occurred to me today that there’s at least some chance that in January of 2011 the US Senate will have 49 Democrats, Joe Lieberman, Charlie Crist, and 49 Republicans. Which is to say that Lieberman & Crist could form a two-man caucus, hold the balance of power, and drive organization of the Senate. Crist could leapfrog seniority and chair a committee. And if it looked like that might happen, mightn’t it make sense for Northeastern moderate Republicans (Snowe, Collins, Brown, Castle) and Southern moderate Democrats (Landrieu, Pryor, Hagan) to join their rebellion against the two party system? 

If this actually happened imagine the pull that group could have. Unfortunately I doubt whether anyone would have the political courage to do something truly outside the box like this.