I'm not advertising anything for Spring, but in the Spring Experience 2007 (Dec 12 - 15, Hollywood, FL), there's a presentation about "Transparent Ajax with Spring Web Flow and ICEfaces". Maybe you, JBoss guys, don't care about Spring Web Flow because you've got Seam. But a lot of people, including me, who like Seam though, use Spring stuff for real projects (I use Spring because it's a requirement from the clients or maybe I haven't mastered Seam yet).
So I'm waiting for a "Transparent Ajax with Spring Web Flow and Ajax4jsf / RichFaces". Thanks a lot in advance for those who are going to write about it.