i've just given another try of kismet under debian eabi : it works! and with gps support !!!
(my zaurus is now a wardriving tool!)
1- configure /etc/bluetooth/rfcomm.conf to add rfcomm1 with bt gps address
2- configure /etc/kismet/kismet.conf to use orinoco source for my asus wl110
source=orinoco,eth0,wl110
3- configure /etc/kismet/kismet.conf to use gps :
suiduser=$USER
gps=true
metric=true (we're in France
3- launch gpsd :
rfcomm bind rfcomm1
gpsd /dev/rfcomm1
4- launch kismet :
kismet
Enjoy!!!
all logs are in /var/log/kismet