There has been no official confirmation of this rumour, but MacDailyNews reports that deals have been reached with three Russian carriers: Mobile TeleSystems, VimpelCom and MegaFon. The ultimate source for this information is the ever-so-elusive "unidentified people familiar with the talks."
iPhone Talks is also reporting on the unconfirmed story but is only mentioning Mobile TeleSystems who is taking their cue from Apple's playbook by declining to confirm or deny.