I swear the Genius Bar hiring qualifications involve a 4th Grade Math Test and a game of Candyland.
The unfortuante problem here is, that iCal won't sync to your Palm (or at least not that I've ever been able to make happen). Having syncing enabled only enables .mac syncing.
It uses it's own file system and protocals that Palm has yet to provide compatibility with. Until they do so, I'm afraid you have to use Palm's goofy little calendar program that came with your Palm for the time being.
Edit: Well wouldn't ya know it I just found
this for syncing Address book and iCal to your Palm.
2nd Edit: I should really do my research before I go shooting my mouth off and "helping". Tiger supports Palm syncing (supposedly), otherwise you have to install Palm's iSync Conduit to make it work.