Help Please - JSPDynpro??

I just heard of JSPDynpro today. I've searched for more detailed information about it. Can someone point me to documentation on JSPDynpro? Can it be used for "pure" J2EE development with NDS where the portal is NOT used to present the application?

I'm hoping it is a tool that can be used to assist in quickly developing the UI for J2EE web applications that are not tied to SAP or EP. Any help would be GREATLY apprecaited.

Thanks you!