I never had this, albeit minor, problem on my old 3G. On my IP4.01 the MobileMe calendars are a little slow to load when I switch from month to month. For example, if I open up the calendar app, July loads up with all 4 of my calendars quickly. When I click to switch to August, it pauses for a few seconds, moves to the August calendar, then pauses for 5 seconds or so before the appointments display. It sounds petty, but its really annoying when I'm trying to quickly check my schedule. Anyone else seeing this?