As per as i know per webapplication there are two types clustering 1) in memory and session replication. correct me , if I am wrong
does JBOSS 4.2.3 GA supports all the types clustering methods same as other APp servers like websphere community edition server supports ? or Are there any differmneces with JBOSS AS 4.2.3 GA and websphere community edition ?
Did you see the clustering guide: http://www.jboss.org/file-access/default/members/jbossas/freezone/docs/Clustering_Guide/beta422/html/index.html
There is also a version you can download from the documentation page.