We are currently investigating data grid products and for the moment JBossCache (or Infinispan) and Oracle Coherence are on the shortlist.
Infinispan technically looks really promising to us but the lack of documentation is a show-stopper.
My question is: Is there a roadmap for the final UserDocumentation? When will the docu be available?
For the time being all documentation is based on the wiki, since this is the quickest and easiest way for folks writing features to document them. By the time we are done with a GA release, or possibly a late CR release, we will be "harvesting" the wiki and compiling user documentation.