Well, I was debugging Glassfish via a remote connection and needed to find a particular thread to pause. Of course I was looking for the http worker threads. Scanning that long list of threads is just to painful. So I thought, "Can I search this?" I hit F5, and low-n-behold a search window comes up listing the threads. I type "*HttpWorkerThread", select one, and am returned to the Debug view with the same thread selected.
Thank you Eclipse. Thank you for just working -- the way software should.