This morning, I booted up into Vista, and to my surprise, my 2 stripes were sitting there, happy to be accessed.
And just so you don't think I'm pulling your leg:

So, for those of you that have had problems since Beta 1 (I had NO problems getting my raids to show up in that build), give it a try now. I may actually use this OS for my primary for a bit, now that I have access to all my stuff.