Just saw this fun new tweak called Packages in Cydia. This tweak is very simple you have to set nothing up it just adds 3 new fields to your about page on your device. In the 3 new fields you can now see a count of how many Themes, Tweaks and Packages that are installed in Cydia. Note that the Packages count includes the Expert packages to. 

This tweak will help you keep track of your Cydia usage. A cool addon would be to flick on the filed and it tell you the amount of space being used.