It's everyone's favorite logogram/ligature/symbol: ye olde ampersand. In print form or plate form, I love what the folks behind Ampersand Design Studio (I'm guessing there's an obsession in there somewhere) have done to it. Hot pink! Neon yellow! Black and white and metallic! It's a regular ampersand bonanza up in here.
Check out more of Ampersand Design Studio's work and pick up your favorite print or plate right here.
(Also, check out the curated collection they put together for Cargoh -- it's full of colorful goodies!)
EDIT: Oh, oh! I just spied an interview with them over on Cargoh as well. Read it!