Perhaps the most interesting fact, other than JBoss beating the pants off everyone but IBM WebSphere, is that the Sun Java Enterprise Platform actually gained significant market share and now owns close to 20%. A 6 point gain over 2004. That’s incredible! I had pretty much written them off. Perhaps the the GlassFish open source project has had a positive impact.
This is data from December 2005 back when GlassFish was in its infancy. Now that GlassFish has hit 1.0 final with Java EE 5 support (and all the Easy of Development it brings to the table), I anticipate these numbers will keep on improving.