SocialMoth is no longer active. Paul is involved with Square (which is doing very well).
View 3 was shuttered soon after the batch and everybody went back to school, I believe.
White Noise is defunct. I'm not sure what Sean is up to these days.
Snipshot was a non-batch YC company, I believe (like Justin.TV). Funded by YC based on an existing relationship from a previous batch, but they weren't part of a batch. Not sure that makes it inaccurate...I guess that's the best place to list them, since they were funded around the same time and demoed on the same demo day.
WriteWith is defunct. Eric wrote for VentureBeat for a while. Phillip joined Auctomatic before their acquisition. Martin did something else, but I don't remember what.