During VoiceCon San Francisco 2008 recently, Microsoft and IBM announced that interdomain federation based on SIP/SIMPLE will be available in IBM’s Sametime Gateway later in Q408 (version 8.0.2). This will enable users of Sametime to communicate with OCS 2007 (and OCS 2007 R2 users once that ships in early 2009).
We believe this is a useful step toward coexistence; however it does not enable the migration or coexistence capabilities that mid- to large-sized organizations will need if they are moving from one platform to the other.