This depends on the progress of JBAS-7644. I'm facing a similar problem re: Weld Integration - but yeah, the idea is to create java:comp entries through the JavaEEComponent associated with the deployment (the JavaEEComponent would be acquired from the MC).
I'm going to fix the JavaEEComponentInformer tommorrow. I don't think it makes a major difference to implement it or use another deployer on top.
I'll outline its usage here when I'm done.