Is it possible to have 2 iCloud email accounts in IOS 5?
It sounds like you've already discovered that you can migrate each MobileMe Family Member sub-account individually to iCloud. Having done that, you can now add the second account to your iPad as a secondary iCloud account by going to Settings &gt; Mail, Contacts, Calendars &gt; Add Account… &gt; iCloud.

You can also add secondary iCloud accounts in OS X by going to System Preferences &gt; Mail, Contacts &amp; Calendars &gt; Add Account… &gt; iCloud. This way you don't have to switch users in OS X to access the second iCloud account's mail.

You can migrate remaining MobileMe Family Members by going to me.com/move, instead of having to create a new user in OS X to do the migration.

Primary iCloud accounts can use a few features that secondary accounts can't:


iOS 5: Photo Stream, Documents &amp; Data, and Backup
OS X Lion: Bookmarks, Photo Stream, Find My Mac, and iCloud Storage