FWIW, I was on a WL for an AKV SV studio for Oct 7, 2008 (last year). About 2 or 3 months out, I called MS and they said the only availability at AKV for that day in any unit was a GV....
AKV GV's are fairly high points (although is BLT the high points king, now?) Also, isolated individual days could be much easier than an entire week...