Good news: it’s back in stock at Toys R Us / Amazon. (This is not an endorsement, just letting you know…)
Caveat: Just saw the big bundles posted for Teen and Mature, at $999.
Update 2:30pm: Just heard from a friend that these went pretty fast and TRUs is now out of stock… the units sold out over an hour or so. Just amazing. Inquiring last night at CompUSA, BestBuy and ToysRUs on the way home from work, I found that staff at the local retailers haven’t any idea when additional stock will be available in-store, so you just have to watch.