I was in the same situation. I went out and bombarded my ISP's tech support with questions, and this is what I got:

All domain names are registered with Network Solutions, the "big daddy" over the internet. Network solutions pairs up DN's with IP address's: yahoo.com = 26.244.189.12

To keep the IP current, you must have the same IP all the time. This is called a Static IP, as opposed to a dynamic IP, in which you get a new IP address every time you connect to the 'net.

You would also want 24-7 hookup to the 'net, so your pages won't go down. Once you have these two things, you can host all the domain names you want.

Hearing these requirements, I attacked my local cable provider with gusto. Since a cable connection is always on, (hence a static IP), why couldn't I serve files off a cable connection? Thats alot faster than T1, which is what my ISP uses!!

The answer is that cable service is designed for downloading. The only thing going upstream is going to be requests for information. Once you start uploading HTML files to your viewers, you will be found out. Its somewhere in the contract.

I am attempting to host my own web/email/telnet/bbs server. As part of this plan, I am getting linux this week. If you find more info, tell me.

Have fun, and may the penguin be with you!!