Continous data replication.

Some time ago, I heard about something called Continous Data Replication (CDR), a concept for geographically distributed databases to maintain integrity over a (reasonably) low bandwidth network. In version 7.20, there is something called HDR (High-availability Data Replication), which is along the way to CDR, but something different, more of a resiliancy/performance thing (you guys know). However, has anybody heard anything about CDR lately ?? Is it going to be available sometime soon ?? Has anybody tried a beta ?? etc., etc. /erik