The InTrade site appears to be down, probably crushed under a heavy load. Just before it went under (about 8PM ET), I captured the following graphs.
Over the last 20 minutes before the polls closed, a glut of rapid-fire trades pushed Brown up 10 points to a new high of 90.
One could surmise that Brown will win by a significant margin, because if it's close any rational person would assume that the Democrats would simply steal the election.
That's why the most bizarre two words in the English language are "Senator Franken".