I am the human idea factory, hear me roa -- um, have ideas.
Call waiting & the www BT should let you toggle call waiting on the web for those times you forgot to switch it off and remembered in the middle of a fat download. Idea one!
Postal address for life
The Post Office parses the address on every letter that goes through the sorting office and stamps it with a code derived from your name and your (post|zip)code (in the UK, that's the line of faint blue dots) so it can be automatically sorted further down the chain. Why not add to their database a set of pseudo (post|zip)codes and give them out to people. All you'd need to have was your name and pseudocode, and the Post Office would match that to an actual address you keep up to date on a web site. Why not actually make use of all these computers and databases instead of just bolting them on to the old style of business? Ta da, idea two!
Hey, and I've got another idea too: Great customer service. Oh, sorry, but that's way in the realm of science fiction.