UpClient now supports the new UDP reporting protocol. We're calling this release 5.0 beta 1. We'd like it very much if you'd all download it and pound it into submission.
At this point, 5.0b1 has been compiled and seems to work beautifully on MacOS X, Linux and FreeBSD. It should also compile on AIX, BeOS, OpenBSD, NetBSD, Irix, Solaris, SunOS, Ultrix, UnixWare and perhaps even Windows NT (with a bit of luck).