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Distributed Caching with ehcache
http://ehcache.sourceforge.net/documentation/distributed_caching.html
Remote Network debugging and monitoring for Distributed Caches
http://ehcache.sourceforge.net/documentation/remotedebugger.html
Distributed Caching Using the JCACHE API and ehcache, Including a Case Study on Wotif.com (A nice caching overview article)
http://developers.sun.com/learning/javaoneonline/2007/pdf/TS-6175.pdf