Plugin's name: last logged in x days ago

I'd like to see a plugin that adds to a user's profile info indicating how long it's been since they last logged in. The results of this info should also be easily accesible to other plugins/widgets to allow sorting of username search results according to how long it's been since the username has last been logged in (e.g. profile_manager has a tools>members search function that allows for sorting, and I'd like it to be able to sort according to "last logged in" with the most recently logged in users appearing first in the results).

I'd be willing to pay $50 for a version that incorporates the tools>members search sorting to "last logged in" with the most recently logged in users appearing first in the results. I think additional copies would sell well too.

Thnx for your time and consideration!

MIKE