Here are my two cents, summary of kismet installation.
I reflashed my N810 (well, I had to...) and installed these packages:

- becomeroot
- flite
- nano
- wifiinfo
- wirelesstools

downloaded nokismet, than as root:
dpkg -i nokismet-0.0.1a.deb (ignoring errors)
apt-get -f install (repairs/ads libpcap0.8 and tcpdump which were missing)

copied the two config files posted in this thread to /usr/etc

kismet runs fine!

to reinable wlan after kismet use:
ifconfig wlan0 down
iwconfig wlan0 mode ad-hoc
ifconfig wlan0 up