Under a Mobile Me Family Pack, I set up a secondary email account for myself, giving me two "firstname.lastname@example.org" addresses. When I transitioned to iCloud, I used my primary Mobile Me account, which I set up on my Mac and iPad. In June of 2012, Mobile Me will cease to exist, but I still need to use that second account. Is it possible to have both my primary iCloud email, and that secondary account on my iPad? (On my Mac, i just set up another User Account, and used it to "migrate" that second Mobile Me account to iCloud.) I would Only need to sync Mail to my iPad for the latter, so would not be concerned with duplicating Adress Book contacts, Calendar etc.
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
You can also add secondary iCloud accounts in OS X by going to
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:
iCloud has a feature called "iCloud mail aliases" which allows users to create up to three so-called alias emails. Each of these is a completely separate email address which forwards email to you and lets you send email from it. Unfortunately, there's no way to have two separate accounts in iCloud, but this may prove useful to you anyway.
To set up a new alias, go to https://www.icloud.com/#mail and open Preferences, accessed via the gear icon in the top right. Under the Accounts tab, click "Add an alias…" and fill out the desired settings.
The Accounts pane in iCloud Mail