Already asked (http://typophile.com/node/79940), unfortunately without a definitive answer.
I think it's custom, also used here (scroll down): http://www.jessicahische.is/infinitelyawesome/lettering/afancypantsjournal/

Her website uses, among others, Ray Larabie’s Neuzon, which is based on Tempo Bold Extended.

Magallanes, by Daniel Hernández seems to me to be very very close...

http://www.myfonts.com/fonts/latinotype/magallanes/bold/glyphs.html

...with just a tug on the leg of the R?

n.

It may be based, in part, on and old ATF face called Wedding Gothic. The main differences are that this sample is a bit heaver, and the midline has been lowered.

Ok. I found the answer. Its modified Sweet Sans.