Many GNOME development packages are being released this week in preparation for the next GNOME 2.30 development release (2.29.3). While GNOME 2.30 will not be released as GNOME 3.0
as was once planned -- but instead has been pushed back to September 2010
-- there are still plenty of exciting changes. Zeitgeist, the "activity journal" that will officially premiere with GNOME 3.0 to make it easy to find and browse files and events from your computer, has reached version 0.3 today.
Zeitgeist 0.3 is still an unstable release (Zeitgeist 0.4 will be the first stable version) and carries a host of changes. In fact, the Zeitgeist engine and D-Bus API have been completely reworked since Zeitgeist 0.2. This new API is much better, but early Zeitgeist adopters will already need to update their applications against this latest interface. Besides overhauling the engine and API, Zeitgeist 0.3 features a public API for Python, changed Ontology from XESAM to Nepomuk, the Storm and Querymancer back-ends have been dropped, support has been added for event payloads, and an extension API for the core engine has been introduced.
There's plenty of other work going on with GNOME's Zeitgeist too, which is talked about in the 0.3 release announcement