Yeah that's awesome! I just got my stickers, too. I got the Greenhybrid.com sticker and I also just put my 60 MPG sticker on the car this morning after my second 60 MPG tank in a row. That was my goal.
Did you put the sticker directly on the car? I put mine on a magnet and then cut it out? I prefer the magnet, because they are quickly removable. I can also have several that I can swap out so the people behind me don't get bored.
I have got to remember to take pictures!