Is there a way to add a Windows Scheduled Task via code?  
I need to fire a routine every hour, and a service is not
appropriate for this specific application.

There's good information in MSDN for this:  
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/task...
skschd/task_scheduler_start_page.asp

There's a platform SDK which includes classes and functions for
enumeratiing, adding, changing, etc.  all the tasks in the task scheduler.