As promised, we are slowly rolling out the third place across our network.
We started with chat.meta.stackoverflow, and as previously announced on the Server Fault blog, we now have chat.serverfault.com.
You may remember we rolled out per-site metas across the entire Stack Exchange network, as well as for Server Fault and Super User, back in July. So from our perspective, we're completing the experience:
serverfault.com Q&A; for professional system administrators meta.serverfault.com community organization and discussion about the site itself chat.serverfault.com real time chat "third place" for regulars
chat.serverfault.com is still a public beta, but we're rapidly closing in on release status. I expect we'll begin a fairly aggressive rollout of chat across all sites within 4 weeks or so -- though do be advised that stackoverflow.com will be the last site to get it because of its immense volume.