Of course, I'd need to grab updated versions of GPSapp and Emphatic so that they play nice with the new fonts in V3... Do such builds exist?

I can only speak for the latter, and the answer is "not yet. But soon." And I'm doing my very best to make it memory-friendly. The problem is, with larger music collections, at some point it becomes an exercise in trying to fiit 10 lbs of crap into a 5lb bag. And when music collections get big, the only recourse is to steal memory from the player's cache. The obvious downside of taking cache memory away from the player is that the disk spins up more often (or possibly stays spun up.) But it also seems that with every new release, less and less RAM is available for cache and/or 3rd party apps, which is disappointing. If this trend continues, I might have to stop upgrading, as I have every feature I need now, except for what emphatic provides.