Cozi Family Organizer

This actually looks pretty cool, and it's free:

Cozi is a FREE online family organizer that helps you manage the family calendar, organize your shopping list and to do list, share favorite memories in a family journal, and enjoy family photos—all in one spot. With Cozi's mobile access, your information is not only available from any computer with an Internet connection, but also from any mobile phone. All you need to get started is a Cozi account and signing up is quick and easy with no downloads required.

http://www.cozi.com