I saw this link being referenced recently. Ignore the name "speed up caching" etc. The entry also talks about resource versioning etc.
"This leads to another question though: How to get a version for each resource? Using your application’s version (if you have one) might be appropriate but depends on how often you deploy new versions, as a new version will make all cached (i.e. even unchanged) resources obsolete. .... " http://techblog.molindo.at/2008/08/wicket-interface-speed-up-caching-resources-forever.html Juergen
