Agreed - an even longer wait. I was hoping to use my newly purchased 15" MBP (Sandy Bridge) to "replace" my MP. However - Thunderbolt RAIDS are probably going to cost a small fortune and won't be available anytime soon. I'd like to sell my MP while it is still worth some decent $$$ but don't see a viable storage alternative as FW800 is too slow and Thunderbolt arrays won't be out there for some time and will cost $$$$$$ as mentioned.
So - I will probably maintain status quo and continue with my MP as the heavy lifter, enjoy my new 15" as a replacement for my 17" C2D, and patiently wait to see what shakes out.