Demographics hack?

[X-Fan]

Sorry if this has been asked before, but I'm wondering if anyone would be willing to create a hack that collates demographic data from a userbase?

By that, I mean the ability to specify certain user attributes, like age (as gleaned from their birthdate), sex (taken from a custom field that requires a M or F input), country (taken from either their location field or from the country flags hack), etc.

I know there was a Birthday hack recently released that showed user ages, and I'm wondering how difficult it would be to tweak that to implement the above?

I'm probably not the only one that would love to see this sort of functionality with vBulletin, especially for sites who offer advertising and would like demographic data to show to potential advertisers.