I bought one in Portland, OR in July at a 7-11 when I was visting... I bought some other drinks and was saving it for later but forgot about it in my backpack. Then going through airport security it was confiscated... I was tempted to take it outside security and go through the line again but I was running late and afraid I might miss my flight. I asked the guy if I could chug it in front of him but he wouldn't let me... I've been to NYC, Philly, Seattle, San Francisco, Denver and some other cities since then and still haven't seen it anywhere unfortunately.

On the subject of "energy soda", Wired has a new energy soda line. Cola, Dr Pepper knockoff, Mountain Dew knock off, and Diet version of the Cola and Dr Pepper using sucralose. They all contain 144mg of caffeine. Wired Energy Drink