I don't have much time to elaborate, but I wanted to jot it down here as a note to myself. Yes, I find myself using my blog as PostIt of sort. I gotta pursue that idea later as well.
Distributed Wiki is what you get when you take something like HTMLHelp and add Wiki-like editing capability and content synchronization via a central server or P2P.
More scattered bits. Manuals as whiteboards and discussion forum. Continually updated product documentation. Kill view and sliding filter bar. Admins updating and customizing contents especially terms by replacing generic terms with domain specific terms. Local cache of content with updates trickling in and out. Living documents.
Ray Ozzie's Groove is a good platform for this stuff. ShareDoc. HelpShare. LiveHelp?