Microsoft has announced that Windows Essential Business Server 2008 has reached RTM! (English now, more languages to come soon). Eric Watson’s earlier blog entry describing the difference between the RTM and GA milestones.
A couple of things you might like to check-out:
The EBS Preparation Wizard - scans your existing network environment for health and EBS pre-requisites - available as a download (this is the RC1 version, will be updated to RTM as soon as post process completes)
Bjorn Levidow, EBS Lead Program Manager, gives the inside story on migration to EBS...
EBS migration interview and RTM