I, for one would love an audio metronome. I tried using the clicking solution that everyone pointed out, but it got too messy. It would insert itself into an existing track, or i would have to stretch it over a 1000 measures, or I would have to constantly keep muting it and unmuting it to not interfere with playback, or i cant have a precount, so I got frustrated using it. I have tried to start a campaign for this one little feature, but Justin prefers to keep the non-paying users unhappy. Maybe if i buy it, he'll change his mind? Hmm...
Anyways, on the positive side of things, Justin has REALLY worked on the GUi and now reaper looks fabulous. Kudos! I adore its new looks, and it feels very much like a professional DAW. Also, the midi side of things seems to be getting cleared up. One more thing is how reaper handles VST windows. I quite like it, I admit.