Electoral Calculus
This is interesting, they are currently sticking with a 72 seat tory majority, but if you scroll down you will see that they applaud the methodology used by YouGov in the recent hung parliament prediction.
Don't know about you lot, but imho all bets are off and I'll be staying up all night for the entertainment one way or the other.
PS
Interesting link Ricardian, thx for posting.