An infrastructure package from SunMicrosystems.
Anyone in the know going to give us a potted overview? --TomAyerst (still ploughing through the hype)
There is a lengthy white paper at http://www.sun.com/software/sunone/wp-arch/ that provides a reasonable overview, once you get past the smart services emphasis. It provides web services using the key technologies of XML and (obviously) Java and all their derivatives, all done over standard protocols. More acronyms than you can poke a stick at.
(Now named SunJavaEnterpriseSystem?).
See SunOneStudio