I need something like here:
http://tongerner.tiddlyspot.com/ (great site, I love it)
Where there are different tabs for each tiddler, but instead each tab has a different story river.
You could have a few tiddlers on one subject, then switch to an entirely different set of tiddlers for something else.
Any help would be appreciated!
(I'm happy to do it myself, but I need to know where to look.)