I have a Wikipedia client on my iPod that does something similar -- touch-and-holding on a link dumps it to a queue instead of navigating to that entry. So as you go through an interesting article, you can queue up related stuff and easily get back to it later, without having to open up multiple pages/set up bookmarks/<mention kludge here>. It is sweet.
Link Pad for Firefox is similar in concept, but the UI could be a lot more elegant.
Link Pad for Firefox is similar in concept, but the UI could be a lot more elegant.