Back in April this year I created a list of currently available tools that support social media measurement and metrics. I found 82 products on the market but confessed that I was pretty sure I'd missed things. I was right, and I got a flurry of comments and emails with corrections and additions.
The list has grown to 88 product. I've added MBlast, MediaHound, Meltwater News, PRMetrics, Sysomos, Crimson Hexagon (taking the heavily contested award for the Most Esoteric Name), and UberVU. Sorry I missed you all, my oversight. I've also removed a couple of entries and made a bunch of other corrections.
You can find the complete and updated list here.
Sorry it's taken me this long to update the list. As always, keep your updates and corrections coming.