ActiveMessaging is still alive...
I am happy to see that ActiveMessaging (a13g<-corny) is returning to life. It was announced with a bit of fanfare by Obie in early 2006 and then disappeared.
Jon Tirsen sent out some invites for a new Google Group and introduced Andrew Kuklewicz as the new maintainer of the project. I think this will become the premier way for RoR apps to interact with Java backends in 2007. Take a look at the code and see how you can contribute!