From Apple’s Website: “You’ll never miss a lunch date or an important meeting. MobileMe pushes your calendar to your iPhone, iPod touch, Mac, and PC. So you always know where you need to be and when you need to be there. Make a change on one device — such as creating or rescheduling an event — and MobileMe updates it on all your other devices automatically. MobileMe works seamlessly with iCal on a Mac and Outlook on a PC.”