I also wanted a tool to leave unattended, hopping thru all 802.11 channels, go read a book, come back, and get some useful information from it. I also wanted to make graphs of stuff, because everybody loves graph, and I do too :). I really believe data representation is very important and changes everything.
So I basically reinvented the wheel, added some stuff to it, everything using python, and came up with WifiZoo.
You can check it out at http://community.corest.com/~hochoa/wifizoo/index.html. You can find a detailed description of the tool in the previous link.
Again, is nothing spectacular, but is a fun tool to use on wireless penetration tests, it works, still lots of functionality needs to be added, but again, it gets the job done. For now, I take the tool as a fun exercise to spend time on from time to time :).