Well apparently people are still pretty interested in detecting alts in second life. One of the most common search terms that sends people to my blog here is 'Second Life alt detection' or some variation thereof. Mostly leading back to some of the old RedZone and JLU posts. Even since I hardly even post here anymore I still get a pretty steady flow of traffic based just off that search criteria.
Of course with this much interest that means there is money to be made. Which, of course, there are plenty of people out there trying to find new means of linking avatars to each other. So be aware and watch out.
Also if anybody does find any supposed alt detectors out there please drop me a note about it at firstname.lastname@example.org or just a comment on this post if you want. I will be sure to pass it onto Linden Labs, Green Zone, SLUniverse and make any information about who is doing it as public as possible. Best way to stop the detectors is by calling out those who make them.