JSF 1.2 lets you leverage Java annotations, and is the newest release for Sun's standard web GUI spec. Martin Ahrer goes onto write about his JSF 1.2 migration :
[With JSF 1.2] now I can start with some of the new JSF features and especially the JSP features like unified EL. Finally I can utilize deferred EL expressions in JSP and thus tag file can implement simple JSF components as well without requiring all the heavy lifting for creating some ‘real’ JSF component.
Read the complete post : http://www.martinahrer.at/blog/?p=14