According to a recent Apple knowledge base article on the subject, when MobileMe displays the following message on the System Status indicator on the MobileMe site, users should take note of operations that can and cannot complete during the downtime:
"MobileMe members may be/are unable to use Find My iPhone, receive automatic new mail notifications (display count on the Mail icon, sound and/or vibration alerts) on their iPhone or iPod Touch, or automatically sync changes to contacts, calendars, and bookmarks between their desktop applications and iPhone or iPod touch."During the downtime, users will most like not be able to access:
- Find My iPhone. When attempting to use Find My iPhone, you will be presented with an error message, preventing searching for your iPhone, displaying a message, remote locking, or remote wiping.
- Automatically Sync. Your contacts, calendars, and bookmarks may not sync automatically between your iPhone or iPod Touch and your Mac.
- New Mail. Even though automatic downloading of messages will be disabled, users can manually update their Inbox. Simply open the Mail application on your iPod Touch or iPhone or click the "Get Mail" button in Mail on your Mac.
- Syncing. Though automatic syncing is disabled, you can still choose to manually sync your contacts, calendars, and bookmarks between your Mac and your iPhone or iPod Touch.