The items on iCal sync to the iPod via iTunes, and to our Samsung Palm phones using MissingSync (and thus to my wife's future Treo p700). Assuming we do data entry via gCal (google calendar -- since email carries much calendar info, users of gmail get rapid data entry to gCal) to our family calendar, this has some interesting options.
It appears one can do private sharing of a calendar:
What's a "Private Address"?My geek radar is tingling. Look at how Google is managing creating merged views of calendars, the notification functions including notify to cell phone, the variety of subscription options, the search and private integration .... This could be the best webapp thingie since ... Gmail. It almost makes me forgive Google for their Blogger atrocity.
A "Private Address" lets you easily view a read-only version of your calendar from other applications. Using this address, you can access your calendar from various applications, such as a feed reader (like Google Reader) or a product that supports the iCal format (like iCal for Mac).
To obtain your calendar's private address, just click on the "XML" or "ICAL" icon. A pop-up window with your calendar's private URL will appear.
Additionally, you can export your calendar information by clicking on the "ICAL" button and clicking on the displayed URL.
Note: The private address was designed for your use only, so be sure not to share this address with others. If you want to let others view your calendar, you can share your calendar's public address (or "Calendar Address") with them. If you accidentally share your calendar's private address, click on the "Reset Private URLs" link to regenerate your calendar's private addres
If Palm had half a brain they'd jump on this like berserkers, but of course that company zombied a long time ago. This must be painful for Apple to watch, they almost had it with .Mac (dotMac) but they lost focus and got greedy.