I'm also wary of a community so tightly focused around one guy. I have only good things to say about Yudkowsky or his writing, but a site where anyone is far and away the most active and influential writer sets off alarm bells. Despite the warning in the death spiral sequence, this community heavily revolves around him.

Yeah, it's a problem. I'd even go so far as to say that it's a cognitive hazard, not just a PR or recruitment difficulty: if you've got only one person at the clear top of a status hierarchy covering some domain, then halo effects can potentially lead to much worse consequences for that domain than if you have a number of people of relatively equal status who occasionally disagree. Of course there's also less potential for infighting, but that doesn't seem to outweigh the potential risks.

There was a long gap in substantive posts from EY before the epistemology sequence, and I'd hoped that a competitor might emerge from that vacuum. Instead the community seems to have branched; various people's personal blogs have grown in relative significance, but LW has stayed Eliezer's turf in practice. I haven't fully worked out the implications, but they don't seem entirely good, especially since most of the community's modes of social organization are outgrowths of LW.