From what I've heard it's still in beta stages and so nobody has it ('cept beta testers of course), so I assume when it is released it'll come with full documentation. It did used to be hosted at http://projects.genscripts.org/nicklust/
but that seems to be a deadlink now
The author of nicklust used to post on this board a bit, perhaps they'll see this thread
Edit: I tell a lie, it seems this DLL is available (with some documentation, but not a huge amount), at this site
(direct download link).