Yeah, I use cassete recorder with my MSX, although quite a number of my tapes no longer work (and the tape drive is starting to have some issues too (hey, maybe the tapes are fine ) so this sounds like a cute idea for me. Nice and easy way to get games running on my old MSX, without needing to do any modding or having to buy extra hardware I don't wan't. Beautiful.

Now I've just got to get my MSX shipped out to me from teh other side of the planet :/

I agree that this is a BRIGHT idea, but not a very ORIGINAL one. The first MSX to WAV converters were published in 1999 and several converters exist. WAV to MP3 has been tested too with different results, depending on the quality of compression and the replayer itself. At the moment, the "standard" loading speed for MSX using the cassette interface is about 8,250 bauds. If compression is considered, it can be up to 15,000 bauds or even more.

I totally agree with the use of cassette interface. Now I am able to upload SOLID SNAKE (4 Mbit) to a 4 Mbit megaRAM from a CD using the cassette interface. For non megaROMs, no extra hardware is requiered.