I'd say the fact that you have no idea how to accomplish it ( neither do I ) would mean that you should give it a shot. I think though that instead of a tag cloud, you might want to check out Google Zeitgeist which might be a viable option. I think that with Perl in particular, seeing what people are looking for would help since with a freer form language like Perl, one needs to look at the average choices as well as the total number of choices...