Would you use a live person reminder service if it were available? Something quick and easy to use where all you do is call a person on a phone, tell them when and where and how you want to be reminded? Then at that time, a live person would call you back (or page or email or all) and remind you? What would you pay - a month?
A friend of mine and I were brainstorming and that was a wish of mine. I'd like to have someone to call me and remind me to get out of bed and go exercise. Of course, I could always not answer the phone...
Would they take offense if you cursed at them? That is something that may take off.