From Engadget:
We’ve already seen it turn up on a few retail sites, but Samsung has now finally officially confirmed the launch details for its WiFi-only Galaxy Tab. It will be available online and at retail stores across the US on April 10th for $349.99. Specs otherwise remain the same as the 3G version, including a 7-inch 1024 x 600 display, 32GB of internal storage (with a microSD card slot for up to an additional 32GB), rear and front-facing cameras, and Android 2.2 with support for Flash 10.1 — from the looks of things, it’s also only available with a white back. Full press release is after the break.
Source: http://www.engadget.com/2011/04/06/samsung-confirms-wifi-only-galaxy-tab-availability-april-10th/