I understand that the Notion Ink and Viewsonic products are cheaper (in price, specs, and build quality), but let's compare products from reputable companies for a second.
Dell Streak 7 - 7" screen (800x480), 1Ghz Dual-Core, 512mb RAM, 16gb internal storage, Dell Stage skinned Froyo
$199.99 plus required 2 year agreement (minimum $24.99 for 200mb) = $799.75 (plus taxes and fees)
Galaxy Tab - 7" screen (1024x600), 1Ghz, 512mb RAM, 16gb internal storage, Touchwiz skinned Froyo
T-Mobile - $549.99 full retail or $249.99 plus required 2 year agreement (minimum $24.99) = $849.75 total plus taxes and fees
Verizon - $499.99 full retail plus $20 (1 month of data) = $519.99
Sprint - $299.99 plus required 2 year agreement (minimum $29.99) = $1,019.75 (or pay $200 EFT for a total of $529.98)
iPad 3G 32GB - 9.7" screen (1024x768), 1Ghz processor, 256mb RAM, 32gb internal storage, iOS
Direct - $729
Motorola Xoom -10.1" screen (1280x800), 1Ghz Dual-Core, 1gb RAM, 32gb internal storage, Vanilla Honeycomb
Best Buy - $799.99 full retail plus $20 (1 month of data) = $819.99
Still seems like a no-brainer to me.