About a week ago Notes, which syncs via MobileMe was suddenly happening only 1 way for me when I set up new iPhone 4S. I double checked the settings and everything looked good, and recently it started behaving correctly. It now sync both ways, between Mac and iPhone. Recently, calendars was acting up, not syncing or slow in syncing. For the events not syncing I would try to "wake it up" by changing something in the event from both ends (Mac & iPhone) and the event has now sync'ed up. I don't know what is happening technically when I "wake up" an event, but I do know I shouldn't need to do this. Why is MobileMe unstable, especially recently? Will iCloud be better, perhaps using a more stable technology? Finally, do you feel now is a good time to move to iCloud, or is it safer to wait.