JavaEE 7 is just out but it already makes a lot of noise! One interesting thing is the JSR 236 (aka Concurrency Utilities for JavaEE). It is basically the specification of what everybody was already doing: using “multi-threading” in JavaEE.
While TomEE still targets JavaEE 6 (hopefully it will target JavaEE 7 after the 1.6.0 release) it can’t be integrated directly in the server. However with a little tip you can already play with it!