I am also expecting the same. I was trying to update web beans to my JBoss 5.0, couldn't succeed. Lets hope they will release soon.
As far as I can remember there is a plan to integrate webbeans deployer to JBoss AS 5.0.1. I think it would be in the default profile similar to the seam deployer that already exists their. But there won't be a final release soon since integration follows the RI spec which is still far from complete.
The next time this issue will still be handled by the current update mechanism. Existing open issues will surely be solved soon. Expect a final integration solution soonest in QI/QII. But it's up to the AS team. Maybe anyone from them has more informations.
We'll probably include the newest version of Web Beans in the next JBoss 5 release as a preview of the stable support.