Windowherbs by Dutch designers Tineke Beunders and Nathan Wierink of ZO design are a really cool new take on traditional windowsill herb gardening. Windowherbs are ready-to-grow, transparent, half-sided herb pots that come with suction cups on one side so they can stick to your window. Unfortunately, I can't seem to find any vendors in the USA... yet, but let us know in the comments if you come across them. Very clever idea.
Windowherbs - Transparent Suction Cup Herb Pots