I'm running the latest tomcat (5.5 something).  So, I drop the latest bsf and beanshell jars in tomcats lib directory, restart, and put up a simple page like
 
<% page language="beanshell">
 
...
 
It instantly dies with:
 
"org.apache.jasper.JasperException: /bsf.jsp(1,1) Page directive: invalid language attribute"
 
 
 
Gary Furash, MBA, PMP, Applications Manager
Maricopa County Attorney's Office