I have been playing a lot lately with a Fon router that a friend lent me, I installed Openwrt and Jasager on it, here is a description of Jasager (Yes Man):

Jasager is an implementation of Karma designed to run on OpenWrt on the Fon. It will probably run on most APs with Atheros wifi cards but it was designed with the Fon in mind as it is a nice small AP which gives it a lot of scope for use in pentration tests and other related fun.

A quick highlight of features:

Web interface showing currently connected clients with their MAC address, IP address (if assigned) and the SSID they associated with
The web interface allows control of all Karma features and can either run fully featured through AJAX enabled browsers or just as well through lynx
Auto-run scripts on both association and IP assignment
Full logging for later review
Basic command line interface so you don't have to remember the different iwpriv commands

As you can see is like Judicious Karma but in an embeded device. I see a lot of promise in this tool for pentesters. The chipset of the radio is Atheros and it is supported under the madwifi drivers, so this little AP has a lot of pontetial, one of its draw backs is the limited space for tools. Right now my only problem has been setting it up as a router. One I have it figured out I will write some scripts to handle most of the stuff I need and document it for whe I have to retur the unit to my friend.