The only one I can think of that's stayed relatively high-quality for a long time is Hacker News, and they actively discourage large influxes--for example, by flooding the front page with posts on Erlang internals when mentioned in the mass media.
Paul Graham also does very active experimentation with HN's reputation system, which I like: There are karma threshholds for voting down comments, higher ones for voting down posts; you cannot vote down a direct reply to your own comment; you cannot vote down a comment more than a few days old (this one wouldn't work as well here). The most radical change he's made is that only you can see the exact karma for your own comments (although comments below zero are progressively lighter shades of grey).
Recently reporters from two major national magazines contacted me in preparation for doing stories on Bitcoin. This reminded me that Wired magazine did a cover story on the Cypherpunks in its second issue. I think the LessWrong community is already larger and more active than Cypherpunks were back then, and potentially more influential, but there hasn't been much publicity on us. I'm tempted to suggest doing a story on LessWrong to one of the reporters. Is this a good idea, or bad?
More generally, do we want more publicity, and if so what's the best way to go about getting it?
ETA: Would it be bad etiquette to reveal the names of these magazines at this point, or even to say as much as I've said?