Through all the excitement there are going to be some issues. This thread is to consolidate those issues.
We will try to deal will all problem but keep in mind that this build is as new to us as it is you.
If you are looking to go back to 2.1, the one sure way I know is to run rsdlite. There is another way but by non its too late. If you make a backup before flashing 2.2 then you could just restore wipe data/cache reboot.