I thought it would be a good idea to track a programming language's popularity by looking at Stack Overflow. I took 20 languages and counted the number of questions per language and put the results up in a table.
I used a very crude algorithm and compiled the results on my blog.
I ran the algo against the number of questions asked for a particular language, but this could be useful information to have if the developers of Stack Overflow could create a page for it somewhere.
They could use votes and answers as well as questions to gauge the popularity of a language, and they could also restrict the queries to a particular month to get an indication of current popularity rather than historical.
Would it be useful? Does it make sense?
(Apparently, SO was not seeded (see comment), so no bias towards .NET from that angle)