A few months back, I tried connecting my Dad's old computer to the internet with it's 300 baud modem. It did actually manage to connect (after numerous attempts) but crashed when you tried to do anything.
At work we have some manner super fast wide bandwidth line. At home I'm trying to decide which adsl company to go with.
http://www.adslguide.org is helpful for a suggestions. I was just going to get a 512 line from plusnet but a friend just signed up with Bulldog and is going on about his 4MBit line. Am eriously considering spending the extra for at least a 1MBit line.