We finally linked them together today (yesterday), and...whoa, this is convenient.
I've thought for years—ever since I got a Handspring Visor with website money when I was in ninth grade—that interlinked electronic calendars would make the average family's life a lot easier. Before, if anybody wanted to do anything, they had to ask Mom if anything was happening that day. If she wasn't around or was busy, we'd have to paw through her desk drawers and purse looking for her datebook and check it ourselves. And of course, if you decided not to bother checking, there was always something happening that day.
Now I can just log on to my Google Calendar account and see that there's a concert that night, but I'm not going to it. Or whatever.
Google may be taking over the world, but I'm not quite sure that's a Bad Thing.