A great resource for copy editors (or copyeditors, if you prefer) is Copyediting-L, a listserv where editors from all over the world post items of interest to one another. If you've got a thorny style issue, a lead on a job, or questions about the business side of freelancing, you can post it to this list and you'll likely get the answer you need.
Copyediting-L has been around for 15 years (a long time in Internet terms); however, I hadn't subscribed before now because, as I said before, I'd rather edit than read about editing. But I'm monitoring it now in case the members might send out something of general interest to readers of this blog. You can subscribe to the list for free, and I think you'll pick up all sorts of good information from it.