Cozi is an online calendar, that allows you to make changes online, and it will automatically update the calendar on your phone, your husbands cozi calendar, etc. (If you have the free app – I have an ipod, and there is an app, there is also one for droid, and you can also access it from any mobile phone, etc).
I am not sure if you can link it to a google calendar, but it would pretty much take the place of one.
Example:
I make a dentist appointment for tomorrow. I put it on my ipod in the Cozi app. It immediately updates my husbands cozi calendar, so if he looks at his app, or his calendar at cozi.com he will see the dentist appointment. The same goes for a grocery list. I can add items to the list, and he will immediately be able to see them on his phone!
The link is http://www.cozi.com
I actually went in and added our entire schedule for the fall onto it! I was able to color code it, mark which days for what assignments, start and stop days, everything! Check it out 🙂