I'm running at ultra-low voltage OC'ed to 1.2 GHz. As far as OC'ing goes, that's about as plain-vanilla as you can get... There are much more complicated (and probably useful) tweaks you could make, but I'm not well read enough to suggest anything else.
Read up on the subject, there is a ton of information scattered throughout the forum community. Every single Droid X is slightly different, so make sure to test any new settings for a week or two before you decide to apply them permanently. And as always, make a backup before you mess with your processor!
Good luck.