For those of you wondering what were they doing in the huge gap from S11 to two months before. Here are some info:

1) The startup they applied to YC is called Yardsale, and it's still alive: https://www.getyardsale.com. "Yardsale, a mobile app to help folks sell goods to local buyers."

2) FOBO is founded by Yardsale, Inc. FOBO received $1.6M in Seed funding. (10/18/13)

3) More stories here: http://josephwalla.com/how-to-hustle-and-launch-in-3-weeks-t...