This is pretty funny - Google is giving away stickers via snail mail. Send a SASE (self-addressed stamped envelope - when's the last time you heard THAT term?) to:
Send me some Gmail stickers already
P.O. Box 391420
Mountain View, CA 94039-1420
Send it by Feb 14 for some old-school fun!
From Official Gmail Blog: Get your Gmail stickers
PS - THIS IS MY 100th POST! Wowza.