Hi jtrag, welcome to the forums.
This particular beta (22.214.171.124) is for AMD64 only.. might be OK for ENT64 (not sure.. anybody?), but it certainly doesn't play nice with Intel x64. I do hope that didn't ruin it for you.
This was certainly a disappointment for me. I uninstalled the previous beta and then tried to install the latest on my Duo2 x64 Vista with no go.
I hope that the next release has something that will work for me.