I have recently reported a number of bugs in bugs.sun.com
It has not been a complete success (to put it mildly) as the bug database has been pagued by poor (abysmal) performance, often rejecting submissions with timeouts or simply just ignoring the submissions.
A couple of times, however, the submission has been accepted, and I have received an auto-generated email confirmation with a URL link to the bug. But two of my reports have never made it online.
One example is http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7105912 which was reported 28-oct-2011, made it to be publicly available for a brief period, but has now disappeared. I have not been notfied in any way as to why.
Other bug reports have never made it online, and all I have ever received (by mail) is a "Review ID".