The JSP2.0 spec is due to be released soon, to be bundled as part of the new J2EE 1.4 spec.
OnJava.com have a good article discussing some of the new features in JSP2.0, which include:
- the JSTL Expression Language (EL) incorporated as standard into JSP2.0
- improved error/exception handling
- Custom tags can be defined in a JSP ‘tag file’ which declares the Custom Tag in terms of another JSP page, rather than subclassing the Custom Tag base classes