You look at it carefully......... just kidding. Not easy, you can try some benchmark R/W that is all about it. Company made a couple billions of those card (I guess), and randomly check one or two for QA purpose. So your chance of being 'correct' from the label on the card is ... 0.01 % . The experiement I did with 5 cards, 1G, 2 G and 4Gs X2 and 8G, with class 2 and class 4, concluded that 1G and 2G were way faster than the 4G and 8G. It does NOT make any scientific sense, but that is what I got, the smaller the size, not class, the faster the nitdroid.

Dont know or never. Since multitouch is more recent than resistence, there will be few incentive to rewrite softwares to accomodate keyboard for multi touch, just my 2 cents.

bun