Update February 2014: Please read this post about my experience working with Runskin for this giveaway. I do not support this company.
Thanks to everyone who entered the Runskin giveaway! You guys have run some awesome marathons; I'm impressed (and jealous)!
The winner is Kimra, who ran the Berlin Marathon:
Kimra, please email me at hi dot outsidetime at gmail to claim your tank!
Thanks again to everyone who entered!