Time Machine is easily one of the most exciting new features that Leopard has to offer. Think that now you don't have to worry about backing up your files. As long as you have an extra hard drive connected to your Mac and that Time Machine is running, everything ever stored and modified on your Mac will be safely backed up.
TimeMachineScheduler aims to give you even more control on Time Machine by letting you set exactly at what hourly interval Time Machine runs. This can be set from one hour up to 12. Obviously then this application is catered towards people that need to save their data at highly frequent intervals.
Unfortunately, the simplicity of the application is overshadowed by a number of flaws. A number of users have had trouble making it run properly and it is known to also keep your hard drive from unmounting, an issue which the developer posts about on his webpage. TimeMachineScheduler can also display information in the Time Machine prefpane wrongly.
TimeMachineScheduler seeems like a good idea, if you're the kind of person that needs regular backups by the hour. Yet it suffers from too many flaws for the moment to be considered a solid application.