Having just caught up on the positive achievements of Alex Halderman, we have discovered that another promising young mind has been lost forever.
Bill Zeller was also a member of Ed Felten's Freedom to Tinker crew and a PhD student at Princeton. Bill also is known for creating MyTunes, which was one of the first implementations to prove Digital Rights Management (DRM) is really the emperor without clothes.
You can read Bill's tragic story here, or his own words here. Even by those who did not directly know him, he will be missed.