I am assuming that you wish to move about (broadband now being as cheap or cheaper if just using one location).

I haven't used dial-up for some years, but have recently been looking at possibilities for mobile access. There seem to be pay per minute deals, or this might work out cheaper depending on exact usage pattern. One advantage of both these services is that you don't sign up for them, just use them and if unhappy you can walk away free.

Of course 3g mobile broadband is the coming thing according to the techno-wizards, prices are certainly falling, but coverage varies. Not for me yet, I think. PC world are touting various packages on their website and in store.

Some of the mainstream ISPs still do a dial-up service linked to a particular line, but the last one with which I was happy (Virgin) now only offers such when linked to their phone service. Not what I am after at all, though maybe suits your case.

All in all, I can't offer any real guidance, but would be interested to learn of your decision, and verdict later.