shade:/home/croy# cd /etc/apt/
shade:/etc/apt# cat sources.list
deb http://rous.wpi.edu/debian testing main contrib non-free
deb-src http://rous.wpi.edu/debian testing main contrib non-free
deb http://security.debian.org/ testing/updates main contrib non-free

deb http://rous.wpi.edu/debian unstable main contrib non-free
deb-src http://rous.wpi.edu/debian unstable main contrib non-free
deb http://security.debian.org/ unstable/updates main contrib non-free
shade:/etc/apt# cat preferences 
Package: *
Pin: release a=testing
Pin-Priority: 650
Package: *
Pin: release a=unstable
Pin-Priority: 600
shade:/etc/apt# 

shade:/etc/apt# apt-cache policy at-spi
at-spi:
  Installed: (none)
  Candidate: 1.18.1-2
  Version table:
     1.18.1-2 0
        500 http://rous.wpi.edu testing/main Packages
        600 http://rous.wpi.edu unstable/main Packages
shade:/etc/apt#