Yup, I verified myself by using a free web proxy. Arrrrgh. I don't even know the support address for my ISP.

This seems to be the same problem ATI had for a couple of months where the http://www.textpad.com domain was completely unreachable. Turned out to be some routing configuration on one of ATI's servers.

What are the odds that the muppets working in the IT department at my ISP are going to jump on this in a timely manner?

At least, using the proxy, I've also been able to download a file I needed from one of the subdomains. I just have to go verify it hasn't been corrupted...

Thanks for your help guys.
Bruno