[mds101]

I'd do something like this: have the user load up X dollars upfront. When they set the time they want to wake up, configure it such that if they don't hit a button on your site within half an hour from their wake up time, the money automatically deducts.

[IEA001]

@mds101: Yes - the current sequence of messages allows for about 30min after the set wake-up time. Brainsync.

And I like the idea to add a balance. Would also limit the amount of partial / dummy records being submitted. Some people are cautious about giving their cc details to new services like this though, see e.g. wozmirek's comment further up. Any ideas how to give these users more confidence in the early days?

[IEA001]

@mds101: I've added a $10 balance request for first donations if users get up late. Will monitor acceptance level and look forward to additional feedback!