Giant Geek Blog

This topic has come up a few times, especially for some peers that originally built to IBM’s proprietary portlet specification, but desire to move to the “standard” portlet specification.

I found a decent write-up on this topic at IBM:
http://www.ibm.com/developerworks/websphere/library/techarticles/0412_paeffgen/0412_paeffgen.html

Cheers!