Chances are if you have a Nexus One you don't mind a little hackery. And chances are you're already a devout follower of the way of Cyanogen. And with that, a third release candidate the CM6 ROM has been released, bringing more (and better) custom Froyo to the N1.
As always, we recommend backing up all your apps and data first, just in case. Then get to downloading (either at the source link, XDA or Rom Manager), and have at it! [CyanogenMod]