Actually, an ID3V2-browser sounds like a great candidate for a userland app, interfaced with the Hijack menu. If you enable notify=1, Hijack knows the current FID. The userland app can go a'hunting based on that information.

Someone is, I recall, already trying to get a lyric-scroller working in this vein as I recall, so an addition of a V2-tag browser to that would be cool.