We are happy to announce the first GeoServer 2.3 release, currently in beta:
http://geoserver.org/display/GEOS/GeoServer+2.3-beta
This release brings a lot of great new features. Find out more about them on the blog:
http://blog.geoserver.org/2013/01/29/geoserver-2-3-beta-released/
You can help us get to the official 2.3 release by by trying out this beta and reporting any issues on the mailing list or in the bug tracker.
The first release candidate is going to be released around February 21 2013, so please, download and test, test, test 
Thanks for using GeoServer!
The GeoServer team