FYI - The TF101-B1 32GB is in store at BestBuy for #399.99 and keyboard at $149.99 AND they now have the Prime in store for $499.99 (also 32GB).
I really like these but unless I found a really good deal on a clean used on I'll probably wind up with a new Prime. I suspect now that the Prime is available the TF101 may start to see some discounting to get them off the shelf.