I expected it to go either way tbh. Both had strong support, RP because of the libertarian lean of Maine (just like in NH), Romney because of its proximity to MA. People might be libertarian leaning there, but they're also moderate.
And it was a crucial state for both too. Mitt really needed to win this one to show he could break the counter-momentum Santorum generated, and RP needed to win it to show he can win states. In that sense, Mitt definitely won tonight (also because of CPAC), even if it was just by a few inches.
Interestingly, now there's gonna be nothing for more than 2 weeks, and Super Tuesday is just around the corner. After that I would think things are settled.
rumborak