I tried Pocket Informant Lite.
It's an app that syncs with your google calendar and/or Toodledo and Microsoft Outlook.
You can merge a bunch of calendars or view them individually.
It's incredibly useful because I can merge my calendar, my daughter's, and my woman's and I can see what I'm supposed to be doing at a glance.
I liked the lite version so much that I ponied up the 13 bucks for the full calendar app.
This thing has removed so much confusion from my life that I can't even quantify it. I use it constantly, and I love it.
The Lite version is free. Google calendars is free. Give it a shot if you have any need to merge a bunch of calendars, whether it be family or work.
Did I say it's awesome?