Sorry, I meant JBoss 5.1.0 GA AS.
I found JSF jars under server\default\deploy\jbossweb.sar\jsf-libs
Just not clear with the version of el-api. Is it 2.0.x or 2.1.x ? It's important to know because new syntax for method invocations in EL works with 2.1.x and doesn't work with 2.0.x.
Here is a line from the META-INF/MANIFEST.MF file in jsp-api.jar:
Thus it would appear that this JAR contains EL 2.1
By the way, examining the manifest.mf jar is usually the best way to determine the version number of any components.