2011/4/27 Jef van Schendel <jefvanschendel(a)gmail.com>:
If you're looking for something similar to those (light, round,
sans-serif) you could have a look at Raleway (League of Movable
Type, Google Web Fonts). It's apparently licensed under the "SIL
Open Font License", will that do?
I couldn't resist messing around with the source files for a bit:
It's very light so I made a dropshadow won't work very well. Instead I
used one of the greens in the image and made it a bit darker.