Broadband without a phoneline

[Knipples]

Is there such a thing, and if so how cheap is it?

I know theres the dongle things, but how reliable are they, and how much are you able to download on them? I dont download a lot now, but I dont have a limit on my current Tiscali broadband set up. When I move in July though, my parents have Virgin Media, but they said they dont want me downloading lots via it (and I dont think they have it set up for downloading - not agreeing with that sort of thing blah blah)

Is there anything I could get, that would let me still download stuff in the same way I do now?