Try
http://www.thefreeinternet.com/ it costs £50 per year inc vat, sign up online instantly (download their software). Seems quite fast, 24/7 free (0800 number), has a few limitations (read their FAQ's eg no streaming), sometimes takes a few tries to connect but no major glitches so far. Quite popular with my colleagues in the Isle of Man (Fraggle Rock) too (where they cannot take advantage of other phone providers but are bound to Manx Telecom!!)
[This message has been edited by pilot999 (edited 19 August 2000).]