GPG error while adding to /etc/apt/sources.list on WM8505 netbook

Alright, so check this out. There a Sylvania (also known as unnamed) netbook you can buy from CVS here in the states for anywhere between $50-$100 right? its got an ARM WM8505 based processor. I believe its clocked between 300-600Mhz, i've read mixed specs. it has around 128mb of ram. It comes with Windows CE (**** edition). I installed android 2.2 on it, still ran sluggish. Then i found a distro of debian (i believe squeeze) available for it, called Abrasive-Linux, also known as Bento-Linux. It comes preinstalled with enough software and scripts to actually make it run on this underpowered pile of....yea you get the picture. Anyways, its actually pretty spiffy if you stay in the command line. As for built in wireless i've gotten wpa_supplicant to use both WEP, as well as WPA2 as long as the configuration file is present under /etc/wpa_supplicant.conf . Anyways, I've ran into some problems after adding the "http://http.kali.org/kali kali main non-free contrib" repository...which may or may not have been such a good idea to add since this device/distro wasnt made to have this repo.


cat /etc/apt/sources.list
deb http://ftp.debian.org/debian stable main contrib non-free

#ADDED FOLLOWING REPOSITORY
deb http://http.kali.org/kali kali main non=free contrib



HDD2:/# uname -r
2.6.29-00236-g4f8dbbb-dirty
HDD2:/# apt-get update
Does its thing for a few lines hitting http://ftp.debian.org and http://http.kali.org

then it throws this error

W: GPG error: http://http.kali.org kali Release: The following signatures couldn't be verified bause the pulic key is not available: NO_PUBKEY ED444FF07D8D0BF6


Any insight? I would really like to get this cheap little netbook up and running a someone decent pentest box, it already runs nmap and p0f flawlessly...i just want a minimum of one fuzzer, one sniffer, metasploit, and a few other basics. How do i find and then add a GPG key to fix this error. Also i will gladly make step by step videos on how to run a hackbox distro on this cheap netbook, and post them on here after its up and running stable. :)