Inter-Portlet communication, WebSphere Portal and JSR168

OK, it appears that Inter-Portlet Communication (IPC) is something that
was, for the most part, left out of JSR168. Sure, 168 allows for
application scope "session" variables, but that's only useful for
portlets in the same application (WAR). So... What's the preferred
method of communication between portlets in Websphere Portal using
168-compliant portlets?
 
This is for a corporate "dash-board" style portal, not an open
free-for-all yahoo style portal, so I'm not hung up about the concept
that portlets should be independent entities. Click to action seems like
old technology, yes? Is it broad-cast messages? Where do I find
information on these?
 
Thanks,
-Walden
 
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Walden H Leverich III
Tech Software
(516) 627-3800 x3051
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com
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Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)