As far as rejuvenation goes, I'd say for starters we could use some news posts that are less than 2 or 3 years old. Then, to attract attention, change the color scheme (yes, we've already been talking about that - good

), then start bringing in/making new content (new qc tutorials, maybe host a few QC mod websites, etc). That'll get this place going again. And of course, the forums can be a hub for development questions and code examples. I'd say this place could be used for more than just general discussion - some code snippets, help with problems, etc would be great (I think #qc could use a little help on that line too; of course, we need to get the general subject of converstaion back to Quake in there...)
After that, just watch the people roll in. If there's a truly active QuakeC community outside of IRC, there might be more of an attraction to modders for getting information (and don't forget to mention irc.anynet.org #qc + #darkplaces [etc] on the site) and actually beginning work on modding Quake instead of, say Half-Life or something...