The CDO Model Repository has a new Downloads page that we're quite proud of:
It offers all kinds of nifty features like composite p2 repositories, repository contents pages, automatic release notes and, last but not least, our new help center (available for 4.1 all drops):
The help center contains the full reference documentation and will be augmented with programmer's guide like articles step by step now.
For those who would like to play with CDO to get a first impression how it feels we're now offering example server and client products, ready to be installed on different platforms (see the first screenshot above).
We hope that these new services are convenient for you and we'd appreciate your feedback to make it even better. Happy modeling...