ejabberd 2.1.7, and ejabberd 3.0.0-alpha-3, and exmpp 0.9.7 have been released, after a few months of development. They contain a lot of bugfixes, improvements and some new features.
If you have ejabberd running in a public server, please update it immediately: those releases contain a security fix that disables entity expansion completely to prevent billion laughs DoS attack (CVE-2011-1753).
This release contains many bugfixes, improvements and a few new features.
A short list of changes:
BOSH: Keep the order of stanzas when BOSH sends several (EJAB-1374)
Regarding ejabberd 3.0.0-alpha-3, it contains several changes. The related tickets can be found on the bug tracker.
Please note that the database schema used in this preliminary release is not yet definitive, and it will probably change in the next alpha and beta releases.
When compiling the source code, it is necessary to install exmpp.
Recommendation: try this alpha release far away from a production server. Try it with an empty database, or with a copy of your existing database. Please report bugs you find, including logged errors if any, in the usual https://support.process-one.net/browse/EJAB or in the ejabberd mailing list.