Only going to track the two most poplar mobile platforms, iOS and android. The thing is if it was just iOS we would not even need an list because there only one tablet size as of current for the iPad and iPad2.

When we add Android and all the current shipping tablets (will not list announced tablets that have not yet hit the market) the pixel resolutions are all over the place. Many of these devices are not even real tablet sizes. It might be useful to see the sizes of pixels resolutions we have to deal with supporting, if we develop for these devices/ platforms.

iOS:

Apple iPad 1024x768 pixel resolution

Apple iPad2 1024x768 pixel resolution

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Android:

Motorola XOOM 1280x800 pixel resolution

ViewSonic ViewPad7 800x480 pixel resolution

ViewSonic GTablet 1024x600 pixel resolution

ASUS Eee Pad 1280x800 pixel resolution

Net'sGo Tablet 7 800x480 pixel resolution

Cruz Tablet T301 800x600 pixel resolution

Samsung Galaxy Tab 7.0 1024x600 pixel resolution

Acer Iconia Tab A500 1280x800 pixel resolution

Advert Vega 1024x600 pixel resolution

AOC Breeze 800x600 pixel resolution

Archos 5 800x480 pixel resolution

Archos 7 Home Tablet 800x480 pixel resolution

Archos 7c Home Tablet 800x480 pixel resolution

Archos 8 800x600 pixel resolution

Archos 28 320x240 pixel resolution

Archos 32 400x240 pixel resolution

Archos 43 854x480 pixel resolution

Archos 70 internet tablet 800x480 pixel resolution

Archos 101 internet tablet 1024x600 pixel resolution

Augen Gentouch78 800x480 pixel resolution

Cherry Mobile Superion 800x480 pixel resolution

Coby Kyros 800x480 pixel resolution

Creative ZiiO 7 800x480 pixel resolution

Creative ZiiO 10 1024x600 pixel resolution

Dell Streak 800x480 pixel resolution

Entourage eDGe 1024x600 pixel resolution

Entourage Pocket eDGe 800x480 pixel resolution

Hardkernel ODROID-T 1366x768 pixel resolution

Notion Inc Adam 1280x800 pixel resolution

Pandigital Nevel 800x600 pixel resolution

Tegatech Australia Tega v2 800x600 pixel resolution

Toshiba Folio 1024x600 pixel resolution

ZTE Light 800x400 pixel resolution

Barnes and Noble NookColor 1024x600 pixel resolution