steps to connect to TimeMachine backups using QNAP 209 (works on Mac 10.7.3)
sudo defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1
sudo tmutil setdestination afp://TimeMachine:password@10.2.10.201/TMBackup
manually connect to aft://10.2.10.201/TMBackup
Connect as TimeMachine
Password: