I would find something like this very handy as now I store links to threads of interest in my personal nodelet, but that fills up fast and needs regular editing. Here's one scheme off the top of my head:

- do all this in a "personal threadlet" (yea I know that makes no sense, would you rather call it the "personal sewing basket"? ;-) to which you can add a link to the root node of the currently viewed thread (no sense tracking subthreads separately, or is there?) in the same way the personal nodelet adds links
- each link has a box which is checked to indicate that you're up to date, and then the link is hidden
- the box is cleared and the link reappears as soon as something is added to the thread
- there should also be a link at the bottom to "remove this thread" so you can ditch something you're reading when it no longer interests you

I may have overcomplicated it, but this looks pretty neat in my head!

--
I'd like to be able to assign to an luser