TmaxSoft JEUS 7 is the second JavaEE 6 App Server
By pelegri on Jan 14, 2010
GlassFish has company! TmaxSoft's JEUS 7 AppServer passed the Java EE 6 compatibility at the end of December and is now compatible. JEUS 7 is currently available only as a Technology Preview, with the final release planned for the end of 2010.
I expect a fairly rapid adoption of JavaEE 6. JBoss and Caucho have indicated their intent to release Web Profile (post, overview, spec) App Servers "soon". Geronimo 3 will implement the full profile by the end of 2010 and so will the final JBoss 6.
And, of course, the modular GlassFish v3 already supports Web and full Profile.
Expanded from @glassfish.