June 17th. Pricing isn't explicitly listed on Best Buy's landing page, but we presume it's the same as we've been told earlier: $499 for the 16GB or $599 for the 32GB WiFi-only versions. If you can't live without some LTE goodness in your mobile life, Verizon's also promised pre-orders for the 4G-capable Galaxy Tab 10.1 today, though that costs a far less palatable $530 (16GB) and $630 (32GB) on top of a two-year data contract.
[Thanks, Jack and Arturo]
Update: Best Buy has sorted out its systems and all four WiFi variants (black or white, with 16GB or 32GB storage) are up for pre-order.