The "Styler" plugin for Geoserver promised flexible styling of your data, using the GeoExt library:
The user guide tells you to first install the REST plugin, and then extract the styler zip file into the /data/www Geoserver directory. However, the download page for Geoserver 2.2 does not include the REST plugin. Installing older versions (I'm using Geoserver 2.2) failed for me, with one error saying "This web site needs a different Google Maps API key" (from /geoserver/www/styler/ - I have a Google Maps API).
REST seems to have disappeared recently: versions up to 2.0.3 contained the option to download the REST zip package, whereas after that there is no mention of REST, and the installation guide remains.
I did find some evidence that REST may have died, however:
This feature is no longer updated as an independent GeoServer download, but is available as part of the OpenGeo Suite. For more information on its development see OpenGeo project page
If Geoserver's "styler" plugin really is dead, then I should probably change the question to something more general like "how do I make OpenGeo's Styler work on Geoserver?" Just wanted to check with others who've had similar experience.
Context I've set-up Geoserver on an AWS EC2 instance (testing map can be seen here). What I'm trying to do is to make those boring grey polygons colourful and interesting, based on their attributes. I've tried exporting the sld that discribes the style below into Geoserver, but, at present, this does not work.