Here's the scenario: My wife has several calendars syncing using Spanning Sync between iCal and Google Calendar at work. From iCal, she has setup syncing with Mobile Me. From Mobile Me, she has her calendar information synced down to her iPhone. From my iPhone, I also have the Mobile Me calendars syncing, and have my own "Chad's Stuff" calendar where I add updates (such as "I'm having Bike Night on thursday - going to The Station for Backfire Moto"), which will appear in her calendars, reminding her that I'm going for a ride and she can't say "boo" about it since I totally updated it digitally - woot. So far, all is good. Now, here's the downside: I have a couple business calendars I manage using iCal and Mobile Me (for freelance work), and my wife has a bills reminder and medication reminder calendar that she uses with her iPhone, iCal, and Mobile Me. Since we both use Mobile Me as our collection/hub, we both see 100% of the calendars on our iPhone. This is a big pain in the ass when she's in meetings and gets an alert for an upcoming conference call with one of my freelance clients, or I get alerts all day about her medication or upcoming bill payments (I know, I should pay more attention to bills, but that's not the point here). What I'm trying to figure out: Is there an intelligent method to "filter" specific selected calendars from appearing in our iPhones? We are using a basic, non-family version of Mobile Me, and we both muddle in Plaxo and Spanning Sync (her work has a corporate Google account where they manage company-wide calendars). For now, we're living with the constant updates, but we're really trying to find a way to "turn off" the calendars we don't really need individually. Any thoughts, you genius people?