I've never used tried trinidad, but I heard of a4j-trinidad (which can be built from the richfaces 3.0.2 snapshot source code). So I think: in order to use trinidad with ajax4jsf and richfaces, we need a4j-trinidad. I've just build the richfaces 3.1.0-snapshot from the svn and didn't see the a4j-trinidad. So can we use the 3.1.0-snapshot with trinidad (1.2.1)? If yes, is there any example I can see?