Using up 1GB a day is very easy. If you are on a 1mb service you tend to download quite large files. Be they game demo's, movie trailers, video tutorials for certain programs, software demo's. Then as mentioned above there is online radio AND online TV. Then there's all the spam mail that ntl don't pick up (ALL of the spam mail), i'm getting about 300 spam mails a day to one of my accounts. Newsgroups (if you can ever get them to work). Online gaming.
2 game demo's and a few hours listening to radio online, and you've passed 1GB.
Keeping on topic though, still no upgrade here in Belfast.