#1 is awesome, but i don't see how that will lend itself to bumper stickers or other media. it's a very cool logo, as far as logos go, and would look really cool on a t-shirt.
#2 has been done before (i think) - not a bad idea, but something about it seems very familiar.
#3, #4 are awesome. i prefer #3 because it's easier to read, and would lend itself to just about any media. the print would be hard to read on a bumper sticker, but with the space it takes up it would be easy to slide something in on the rest of the sticker. i voted for #3.
#5 thank you for including this one, and although it is simple in nature and easily transferrable to whatever media, i don't think it stands a chance against #3. if it does win, my ego will be so big none of you will be able to stand in the same room with me...
