If anyone stumbles upon this article, I'd love to know if anyone has found a realistic website to play cribbage on. I've been playing on both Game Colony and eCribbage, and both are miserably unrealistic. At both, the cut card is a complete joke. Every single hand the cut card gives the combination of players a maximum possible score. You can go months (I went ~18 tournaments in a row) without winning a match, because they give you bad marks for telling the truth that their site is garbage. It's an embarrassment that the ACC, who is supposed to be a leader in cribbage, is partnered with either of these two sites.
I've started working on my own site, but it needs more time. You can play against yourself at this point, and see it 100 times more realistic than either Game Colony or eCribbage at this point. Check it out at: http://realcribbage.blogspot.com