Currently Being ModeratedDec 31, 2012 4:20 AM (in response to vmate001)
When you log in in System Preferences>iCloud and check 'Mail' in the checkbox there you will be asked to create a new @icloud.com address.
If you have already done this and want another address you can create up to three 'email aliases' - these are additional addresses (not accounts) which deliver into the same inbox as the main account. (In fact it's a good idea to give out alias addresses, rather than the main address, because if they attract spam you can easily change them.) (New aliases can only be @icloud.com ones; @me.com addresses cannot now be created.)
You should be aware before you start that once you've created an alias you cannot turn that address into a full iCloud account, move it to another account, or reactivate it if you delete it.
More information on aliases here: