I was signed up with Access4less.net for about a year before I gave in and got cable - would have prefered the cheaper DSL.
All I got from them was a phone number, username and password, and all they got from me was $5.95* a month.
When I went to cancel, I just sent them an e-mail and they confirmed is later that day - no hard sell, just a thanks for using their service.

*$4.95 seems to their current sign up offer price, but there is a $8 sign up fee, I don't recall if I paid one.