If you encounter a problem using the up2date, like being informed that an update is available but it doesn't download it, please check the up2date log for lines similar to the one below and post them here.
Thanks,
Kai
2010:06:17-19:19:16 dev-kbaesler-02 audld[17140]: http://93.189.156.234:80/asg/v7/sys/u2d-sys-7.930-950.tgz.gpg Server Error code=500
PS: you can download the up2date package manually from the ftp server. Links are available in the release announcement.