I've been using fetch lately to improve battery life, and have been doing it with Exchange. It works wonderfully. Everything is fetched and synched perfect with Outlook. I have PUSH turned off, and have fetch set to 'manual'. Last night, I added Mobileme to my phone. My wife has been using MobileMe on her 2G iPhone for the last week or so, and it's been great. I wanted to get our home calendar on mine too, so I added it, but left PUSH off. I noticed that I would get calendar updates when I opened the calendar, and it would fetch manually at that time, but one thing I found... If I make a change to a calendar item on my wife's phone (ie. add a note), that change would not make it to my phone even with opening and closing the calendar over and over. When I turned on PUSH, it showed up immediately. So, it seems MobileMe really needs PUSH to work right. Anyone else experience this?