I've used 800mhz, 900mhz, 950mhz, 1ghz, and 1.1ghz and all have been flawless. I finally settled on 1ghz and haven't have any problems with it (been running 1ghz for a few days now).
Jhank, how did you install? Did you do a complete and total clean install and then manually install from the Market every single app?
I was having some USB reboot issues. Luckily I have a good copy of a nandroid backup so I can get back to my "regular" status at any time. Still tinkering with it...
-Wil