Hi Mike,
So there are two ways to see your calendar on your iPhone:
1. If you're using Leopard you can
subscribe to your SeedCode Calebdar from iCal and then iCal will synch your subscribed calendar(s) to your iPhone. These will be read-only on the iPhone, just as if you'd subscribed to the schedule of your favorite sports team.
2. You can use the iPhone's web browser to view SeedCode Calenar's
IWP (instant web publishing) Module. This will let you browse, edit, and add appointments and contacts live, without synching. This is the only way to actually edit FileMaker appointments on your iPhone.
Hope that helps.