Over on his blog Sebastian Kügler talks about the status of Akonadi, how the migration of Kontact to Akonadi is going, and in general where the direction of development is leading.
As a status update, sebas notes "Initially, we had planned to release the new Kontact along with the rest of the KDE Applications 4.5. This did not quite work out, so we pushed the release back a bit, and are planning to release it along with one of the 4.5.x updates. The current plan is to release the Akonadi port of Kontact still this year. In contrast to our usual releases, this step is a bit different. We want to avoid hassle for the end-user as much as possible, so we are extending the beta phase until we think the quality is sufficient for the high demands of users, which is especially important in Kontact, where you likely spend a lot of your time."
The blog post also gives some more insight in how Akonadi works, and where it will be used in the future. He concludes "With all the above in mind, there’s little less than a revolution going on in the groupware area. Akonadi matures further and makes possible a full-fledged groupware client in the form of Kontact, with excellent scalability and extensibility. Akonadi is built with a whole spectrum of target devices in mind, which shows in the Kontact Mobile suite running successfully on a N900. With more applications being available in their Akonadi versions, Akonadi will become a lot more useful, and enhance many other applications in the process. Akonadi also allows for a better user experience around email and calendaring in the primary workspace. Groupware is becoming a generic service on the local client. The upcoming new Kontact groupware suite is only the tip of the iceberg of what’s coming thanks to Akonadi."