Shipping times slip to three weeks, but $599 and $699 models are still available.
Source
A Guy
This may be a good sign for Microsoft: a little over a day after putting its new Surface RT tablet up for pre-order, the entry-level $499 version of the tablet has sold out. Its estimated shipping time has slipped from October 26, Windows 8's release date, to a more nebulous "within three weeks."
Source
A Guy