Oh, don’t forget is a very simple tool used to send text message reminders

Oh, don’t forget is a very simple tool used to send text message reminders.

After entering your cell number, the date and time you want the message to be sent, and the message, Oh, don’t forget sends out the text message to your phone free of charge. This is a really handy tool for keeping track of those fleeting thoughts and random appointments that are thrown at you each day.

As explained in the F.A.Q. of the site, the service works without knowing the cell phone provider because “ohdontforget is actually one half web application, and one half magic voodoo potion. Even I’m not sure how the magic voodoo potion works :)” Makes sense to me.
More at:http://ohdontforget.com/