Good news: all those new tablets you see reported on these pages aren't being stolen by elves; they're entering the human population at large and -- most Christmassy of all -- they're displaying ads. Google told TechCrunch that its AdMob platform saw eight billion ad requests from tablets during the month of November, compared to one lonely billion back in December 2010. Total AdMob requests amount to roughly three billion per day, however, so tablet advertising is still sugary froth compared to that on smartphones.