On the front page, could there be a box at the top right or something. Inside this box would be a random game (with over 3 star rating). This means that every time you view the front page of the site you're presented with a decent game you may not have played yet! The only factor that would effect what game it is would be the rating.
They should [have] found a way to translate the old rating system with new one. It would've given people more to bicker and complain about, and given these old games rating. Win win, right? Wait...
Great idea, however Fifth makes a very valid point about older games. Shame though... maybe we should have it anyway, a) it might encourage people to rate games more and b) it'll be useful for the future, say in 2 years time when someone else mentions the same idea!