hello all, i can confirm that cloned SystemID, MLB and ROM still works for me with push and cellular SMS too.
i use this data since mid. November.
i´ve got the data from my iMac 11,3 with os x 10.6. i used a 10.9 USB drive to get them. i use a Macmini 6.2 SMBios
this mac never was connected to imessage, icloud and the other services (in use in a shopping window).
i can´t check if the iMac is blacklisted now because he got no internet connection.