Forum .LRN Q&A: Re: dotLRN Portal Framework and uPortal
I think this would be an absolutely outstanding and important thing to look into. As you said, this is an important part of opening up dotLRN/OpenACS to other systems, many organizations already have portal servers running to integrate all their different systems.
(Btw, support for iCalendar servers is another place where we need to open up, but that's irrelevant to this thread).
I'm really hoping this will happen.