It looks like it only supports the first generation Phenom processors. You arent going to find anything clocked too much higher than your current one, but you can pick up a 9950 which will give you a quad, you can get the OEM versions for either $157 or $86 depending on if its the 125W version of the 140W version.
So do i need the 125w or the 140w? i dont really care about the more expensive one i just need to get it to work. And would i see a performance upgrade if i upgraded to a quad from a dual?