Figured out a way to stop the market from auto updating itself after you uninstall the 'update' to v3. However, I take no responsability if this screws up your phone and more knowlegeable people can feel free to chime in...
1) locate /system/app/MarketUpdater.apk on your android.
2) change the Read, Write, and Execute settings to none (was rw-r--r-- for me)
That should do it. So far, I have not had the market update itself and am able to continue using v2. I used Absolute System [here:
https://market.android.com/details?id=com.canvs2321.absolute.system&feature=search_result] to undo it, although I am certain there are other pieces of software out there that can modify system files and allow you to look at the data. You DO need a rooted and NAND unlocked phone it says to run the software.
Hope this helps a few ppl.