There is not a guest account on the AC3 or AC3Pro web servers. The configuration tab is in the tank database window because each tank will have a different connection mechanism (tcp, serial, etc.). It would be easy enought to rearrange the menus, if that would make it easier for new users to set up.
I think one of the main problems with the current version of AquaNotes is that it has many options still available that are not used (like paging, modem dial-in, etc.) If these features were not expose the user interface would be much less complex, and I think that user confusion would be minimized. I've been reluctant to remove features, but perhaps now is the time to get rid of functionality that no one is using.
Curt