I replaced /system/app/Vending.apk with the 2.2.7 com.android.vending.apk found here:
http://xdaforums.com/showthread.php?t=875067
After doing this and rebuilding dalvik-cache I have the new market and I am able to install paid apps! I'll make an update for it tomorrow, I have to crash.
When you doing that update? Having too many market issues right now lol