As promised, the Lindens have provided more clarification for their new trademark policy-- read it here. Most of it better explains issues buried in the thicket of the new brand center; the strongest point, I think, is that sites which contain the words "Second Life" or "SL" in the domain name with just one common noun-- Secondlifeherald.com, Secondlifeinsider.com, to name just two-- must change their URL in three months, or request an extension. Sites like secondlife.reuters.com and secondlife.blogs.cnn.com, however, are fine as they are under this new policy, which allows "SL" to be associated with a previously existing trademark.
"If there are still remaining or follow-up questions after that post," the Lindens' PR rep told me yesterday, "I’m happy to try to get those specifically addressed for you." I relay that offer to my readers: if you still have queries after reading it, post here in Comments, and I'll try and relay as many queries as possible to them.