Hello All,
I finally got the issue resolved. I have the Mac App Store Working. Here's what I did:
OK, first I reformatted my HD. The original Snow Leopard disc that I have is version 10.6. So once I installed 10.6, I went straight to iTunes, and hit update. That brought iTunes to version 10.1 (this is without updating SL). I opened iTunes, signed in the store and downloaded a free app. After the app download was done, closed iTunes then restarted the computer.
When back from restart, I ran the Software Update (to bring it to 10.6.6) and let it do it's thing. Once the download was complete and installed, I restarted once again (just to be safe). Then I finally clicked the Mac App Store icon and voila! Able to get in without problems!
Hope this helps!