First impression: all these guys are better than the other sides' guys. Not all are equally electable, but I like 'em.
My own personal favorite, Fred Thompson, was too passive. 'Course, it's hard to inject yourself into a forum slanted toward the frontrunners. But I don't think Fred will last much longer.
Rudy Giuliani gave a pretty strong performance, though he isn't contesting New Hampshire aggressively. He was just there to protect his national standing against the day he makes his move. That day'd better come soon, or it won't come at all, though.
Mike Huckabee faces a lot of antipathy to religious folk in New Hampshire. His aim was to show that he's more than a one-trick pony. I like a lot of what he said, though I'm generally queasy with "let me help you" Christian politicians.
The real battle in the State is between Mitt Romney and John McCain, both of whom did well. Romney appeared well in command of his facts (as he usually is), but he also came across as more authentic than his usual presentation. McCain managed to appear firm and affable rather than hard and sarcastic, which is sometimes a challenge for him. The pundits are saying that Romney helped himself more than the others. That may be so. We'll see.