Ok, I'll suggest that to Igor, but the seam modules aren't in central either :)
The Maven team at JBoss has been trying to tackle a sync of JBoss releases to central. They've had several false starts...not sure how close they are. But the goal, last I heard, was to make it happen.
The reason for doing it this way is that we want to have an independent repository of JBoss Releases that is brought into central collectively rather than having individual publish credentials for every project (just gets too crazy).