Add different iCloud email to existing AppleID Lets say an AppleID is created with the iCloud email address somebdy@icloud.com (misspelled).

Is there any way to correct the iCloud email to somebody@icloud.com? Creating a new AppleID would lose old purchases and is not an option.

Is iCloud permanently linked to an AppleID? Is there a way to change the @icloud.com address?

According to this Apple support article, renaming the iCloud/AppleID prefix is possible as long as it is not an @mac.com or @me.com (quoted from link).

However, when I follow the instructions, I only see an option to add a new primary email, I don't see the same screen as in the last illustration in that article. 

Apple's screenshot:


My screenshot:
Even though the Apple support article referred to doesn't specificaly say this (I'm assuming it's because @icloud.com was only introduced recently and the article was never updated), what goes for @me.com and @mac.com goes for @icloud.com (they're all aliases for the same address).

ie, read: Some Apple IDs, like those ending in @mac.com, @me.com or @icloud.com, can't be changed.

So no, unfortunately you won't be able to change.

iCloud: About your icloud.com, me.com, and mac.com email addresses
http://support.apple.com/kb/HT5441