There were 8 simultaneously in the first cycle. Some definitely worked out: Reddit (which was a merger of 2 from that batch), Loopt, Textpayme (the first YC fu

There were 8 simultaneously in the first cycle. Some definitely worked out: Reddit (which was a merger of 2 from that batch), Loopt, Textpayme (the first YC funded startup to be acquired), and Kiko (which was not itself a big success, but afterward the founders started Justin.TV).