This probably isn't all that helpful, but I just keep up on the individual packages ( front page, forums, and in some cases, mailing lists ). I read a few other news sites, but that's about it.
Something happens, I know about it well in advance from a few different sites.
Most large projects have mailing lists specifically for security advisories. If you suffer from acute versionitis and have to know about every new release, subscribe to the -announce lists. If you really want to follow the projects (and get flooded with mail), subscribe to the CVS commit lists.
distrowatch.com is a good one... madpenguin.org and lwn.net also come to mind. Really though, keeping up with linux is all about reading forums and subscribing to mailing lists. Like another poster mentioned, I also have a gmail account for mailing lists that mainly revolve around linux, it's a good way to compile a ton of informaiton into one place and search through it when you need to find something specific. As for the forums, check out the boards at linuxquestions.org, they will keep you busy for awhile
your welcome. the thing i like about that site the most is that when i was under the gentoo flag i was almost as bad as some of those people. luckily i saw the light and returned to the one true distro, slackware.
i'll never apologise for liking something. I was merely slinging out one of the sites i frequent. Because i figured the obvious ones would be hit soon enough, /., osnews.