With great pleasure I can report that the Hitachi Cosminexus Application Server v10.0 has recently been Java EE 7 certified! Cosminexus joins the ranks of GlassFish 4, WildFly 8 and TmaxSoft JEUS 8. Cosminexus has long been a significant player in the Japanese market backed by our good JCP partners at Hitachi. All of the Java EE certified offerings are always listed on the official Java EE compatibility page.
As many of you know Java EE 7 compatibility is one of the most significant goals of the upcoming WebLogic 12.2.1 release. We also know that the IBM WebSphere Liberty Profile team has been aggressively pursuing full Java EE 7 certification through monthly beta releases and seem close to being done. The Apache TomEE team is also working on bringing forward Java EE 7 features. Judging by past history of release cycles for JBoss AS and JBoss EAP it's not unreasonable to think JBoss EAP will likely be Java EE 7 certified within this year (for those unaware WildFly is the upstream project for JBoss EAP much like JBoss AS once was).
So the question now is who will be next to cross the Java EE 7 compatibility finish line - only to start working on their Java EE 8 implementation :-).