Since there is currently no way to restrict what IP address users can access the system from (I submitted a separate idea for that as well), I would love to see a way to generate a report on what IP addresses that it has been accessed from.  I can see that the data is available in the system by clicking on the "Last seen" field in the user profile. That brings up the screen below.

If we could get a report that showed all IP addresses globally that would be very helpful.