I installed Spybot S&D 1.6. I can't check for updates unless I disable Norton IS 2007's firewall. There is an exception for Updater.exe, but it doesn't work. What ports does it use? I guess not 80.
I had a look at the update process while using Process Explorer, but the danged thing closed before I could locate the port used. (One of the problems with being up to date all the time.)
The only thing I can offer is that the updater is called "SDUpdate.exe", not Updater.exe, maybe if you change that in the firewall it may make a difference.
Not used this firewall.
Capture the traffic with Wireshark. I don't use sb s&d.