Last night I tried to get on the net with my Dreamcast (using NetZero of course), and I found out my modem no longer worked. I haven't used my Dreamcast online in while (several months), so there is no way for me to know when it broke... I found out Sega doesn't sell replacement modems... I was able to return my Dreamcast to where I bought it from, Sears... Keep in mind I had no receipt, and no box, just the system. Since I bought it at Sears with my Sears card, they brought up my "records" on their system there, and that was good enough as a receipt to them. They gave me a new Dreamcast system.
Sears is cool. :)