Great news! CyanogenMod 6 is now “stable” and available for download! For most phones, you’ll need access to the root and boot-loader. If you are a first-timer, make sure to head over the Cyanogen’s site for full directions as you could brick your phone if you are not careful. Click on the source link for phones supported and all the rest of your needs. I am flashing my Nexus One now!