Corion,
I consider it bad form for any test suite to automatically assume it is ok to contact the internet let alone phone home. I also see the interactive is bad argument. The comprimise in my opinion is to prompt the user for input with a sane timeout automatically defaulting to "no".

With that said, I was thinking that it might be good to have continuously updating saved HTML files. I really haven't thought this through but here is the general idea. You have code that periodically logs in and pulls down sample files that are scrubbed (if no demo account available). These files are then place in a public facing location that the test suite points to if the user decides live tests are preferred.