Just a reminder that MobileMe comes to an end on June 30. If you rely on it for e-mail or to sync your contacts or calendars between devices, you must switch to iCloud before then. And before you switch to iCloud, you must be running OS X 10.7.x (Lion) on your Macs and the latest iOS on your iPhones and iPads.
If you are using OS X 10.6.8 (Snow Leopard), you can purchase Lion on-line by going up to the Apple menu and choosing “App Store”. Or click here. If you are using an older version of the OS, you will have to upgrade to Snow Leopard first, or buy the Lion thumb-drive installer from Apple.
If you don’t rely on MobileMe for over-the-air synchronization of that data, this really doesn’t concern you. You can make the switch to iCloud, then manually update your e-mail settings if desired.
Note that some services will be lost in the transition from MobileMe to iCloud. Among those, iDisk will go away and there will be no more web hosting. If you need these, you will have to find other services to fill the gap.