Two sister VNU publications Brandweek and Adweek are running the same article today under two similar headlines: Are Marketers Dying on Second Life? (the former) and Second Life Loses Luster. It's mostly a follow-up with the author of the Komjuniti study about second lifers not being all happy with how RL brands present themselves.
On a related note, there's this Unofficial Tourists' Guide to Second Life coming out in April ($10 on Amazon). It reminds me a lot of those Internet Yellow Pages books that in the beginning used to list FTPs, Gopher sites, and newsgroups. By the time the SL guide comes out, half of the landmarks will probably be gone, but it's a good buy for the future nostalgic value.