Holdposition,
If you are going to run your notebook both at work and at home, it is a lot easier if you have the same ISP in both locations. That will allow you to just plug in without dual accounts.
The second option would be to setup a Cable/DSL Router in both locations. The Router does all the work to get the internet up and running at the location and you just plug in to your network and you will have internet access. As long as you use the same network TCP/IP Addresses for both routers, you will be able to plug in at either location and have instant access to the internet.
We can go into greater detail when you decide whether to go AOL or Pipex.
Take Care,
Richard