Debian has the "Popularity contest" package (short popcon) that sends a mail once a week about which packages (including version information) are installed on the system (and I think also about which are used, but I'm not sure).
in reply to Padre and usage statistics
I'd like to have something similar for CPAN modules in general (I proposed it some times ago, and rafl wanted to give it a shot, but has found more interesting projects in the mean time).
It's the kind of information I'd happily provide, because it can be collected automatically, and doesn't reveal anything private about me.
I understand your desire for more data, but I'd be very reluctant to have it gathered and sent automatically. I'd answer a poll with this kind of questions to the best of my knowledge, but that's about it.