I can smell the flames now, but I'd rather someone not like me than do something wrong i can't reverse.
1. flash back to 2.0.1
2. use the rooted version of 2.1
3. ..use overclocking program?
Also, I'm sure this has been asked enough to make you rip your hair out, but we were all newbies not even a year ago to this amirite?
If you've rooted, would you do it again if you had to? I see overclocking and tethering, but with tethering available non-rooted, what's YOUR reason for rooting and going through the process of downgrading and rooting?
For those that offer help, I thank you in advance.