The Post-Reminder module is nearing 1.0 release. The major issues I felt the module needed before it would be worth of a 1.0 moniker were a user list of their own reminders, validation that the Amount of Time field was an integer, and an error message on the node creation form if no content types had been set as allowing reminders to be set for them. Those items have been accomplished.
The final steps I want to complete before calling the module 1.0 is making the reminder message cleaner/prettier and putting together a project page with documentation. I hope to have those completed and announce a 1.0 release by the end of the week.