You'll find step-by-step instructions here.
Open the SeedCode_Subscribe_Setup.fmp12 file. Click the "New Calendar" button.
Give the calendar a name, then describe your new calendar on each of the numbered tabs:
You can use our demo server for testing. Just turn the "use demo server" switch on in SeedCode_Subscribe_Setup.fmp12. (Your events will be watermarked with ****DEMO******, but don't worry--that's just in iCal, etc. We're not really changing your data).
Subscribe in iCal, on an iPhone, and in Google Calendar. Details here.