Not yet, im stealing my parents wireless broadband, and already hammered it. They only get 2gb a month
Edit: ok, you twisted my arm:
Thank goodness for RAW. The first one the flash fired, obviously, the second one it didnt. I figured out with some playing this morning that if the flash isnt fully seated on the hotshoe, it will still fire, but you lose ETTL, which means it fires full power and even with Enerloops it cant recharge THAT quickly. So a lot of the flash shots were over-exposed, bar a few where i was far enough away that full power on the 430EX balanced ok.
The other bummer is that because i was assuming that i could shoot ETTL i was also assuming that i was exposing with the flash synced, where i wasnt, so my shutter speeds were woeful (until i switched to manual at the end). Lessons learnt i guess.