Thanks! We were both finalists for the ArsDigita Prize, a programming contest for high schoolers that ran from 1999-2001 (different years though), so that's how I initially heard about Aaron. When Paul Graham announced the Summer Founders Program in 2005 (as YC was called back then), Aaron posted on his blog that he was looking for a co-founder. I emailed him and we ended up getting accepted and spending the summer in an MIT dorm room building Infogami. Jottit came a couple years later.