Problems with package verification

["Aaron Stromas" <passogiau@gmail.com>]

Greetings,

After changing my /etc/apt/sources.list to contain

deb http://http.us.debian.org/debian/ testing main contrib non-free

I am having problems with verifying packages:

# apt-get update
Get:1 http://http.us.debian.org testing Release.gpg [189B]
Hit http://http.us.debian.org testing Release
Err 
http://http.us.debian.org testing Release

Get:2 http://http.us.debian.org testing Release [35.4kB]
Ign 
http://http.us.debian.org testing Release
Hit http://http.us.debian.org testing/main Packages
Hit http://http.us.debian.org testing/contrib Packages
Hit http://http.us.debian.org testing/non-free Packages
Fetched 35.6kB in 2s (15.8kB/s)
Reading package lists... Done
W: GPG error: 
http://http.us.debian.org testing Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 010908312D230C5F
W: You may want to run apt-get update to correct these problems

Also, if I attempt to run apt-setup, my selection are again mirror.espri.arizona.edu and  debian.csail.mit.edu/. How can I get myself realigned again? TIA,

-a