Almost a week ago, one of the most popular web mapping server engine has been updated, GeoServer 2.2 has been released. As they wrote: "The release of a new major version update is a big deal (the last one was over 16 months ago) [...]", here's some of the highlights, follow to link to get the full overview!
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NTv2 and NADCon Support allows for datum transformations with cm level precision
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Continued work for supporting high accuracy datum transformations
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A new reprojection console
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The image collection coverage store allows users to serve un-referenced data through WMS using image/pixel space as the coordinate system
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Support for WFS 2.0 adds some interesting new capabilities to the WFS protocol
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Support for additional dimensions brings time and elevation support to both vector and raster data. And, with support for time, comes support for animation in WMS.
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A GeoWebCache configuration GUI is now available directly from within the GeoServer web admin interface
And much much more...

Re: GeoServer 2.2 Released
Works great with the QGIS WFS 2.0 Client Plugin:
http://www.weichand.de/2012/06/07/wfs-2-0-client-plugin-for-qgis-english/
Thank You!
Jürgen