Sure that would be nice too. :) In fact, that would solve my other frustration with the personal nodelet: the long titles run together so it is hard to tell where one title ends and the next begins. In fact, I've done /msg tye 12345678901234567< em>45678901234567< /em>5678901234567 to exploit a bug in the chatterbox breaking of long words so that my right-hand column is wider just to reduce this specific problem. Yes, I'm a freak.
My personal nodelet has gotten a bit out of hand, so I'd still like the "remove this" feature I asked for because it clues me in that I've already added this node and saves me from searching through the huge list I've built. No, I don't consider it important.
But if I had to choose between the two, I think I'd vote for fundflow's idea.
(but my friends call me "Tye")