There is a dll called nickLUST.dll which allow u to customize nicklist....
It's interesting but there are some bugs....
First what does it do...
It allow u to colorize ops,halfops,voices and regulars... and u too withi diferent colors....
It allow u to put an icon before the nick in nicklist (icon for op voice and halfop)
And what exactly u asked.... on mouse over it displays something like bubble in which there is some information ...
u can change the color of the 'bubble'.... and the information in it...
It's nickname host and common channels by default i think but i'm not so sure.....
and now the bugs...
It has something like refresh rate and i saw something like vibrating in the nicklist......
And the other bug was.... i dont know what was it exactly but i was forced to use the task mannager to end the mirc process..... and then to unload the file by del lines in mirc.ini....
But i thing it would be nice to have sometnig like this in mirc.... but made how it have to be.... without bugs
Respect ! ! !