Cache of mirrored tracks recently played by mpd

[mach-o]

I'd love to be able to listen to my I large-ish music collection (kept on a headless mpd server) even when I lose network connectivity, and without having to tend to a local mirror as my collection evolves.

What I envision is essentially a local music cache: Earmarking a storage area (e.g. 3GB) on my mobile device or laptop, and then having that space automatically fill with the most recent songs played by mpd (which will approximate those I'm most likely to want to hear again soon). Once the area's full, the song least-recently played by mpd would be overwritten.

Has this or something like it been done? Could an mpdcron configuration help to achieve it? Would that require a new mpdcron module? Is there a forum better-suited to this post, to keep this issue tracker free of overly ambitious feature requests?

I'd welcome responses to any of these questions!