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Mark writes –

In this little proof-of-concept I was eager to try out if I could swap the Microdrive inside an iPod mini for a Compact Flash-card. These cards are getting bigger and cheaper by the day so my idea was, if this works out, we have a great way of extending the life of this little MP3-player.

geektechnique.org: turn your iPod mini into a flash based iPod – Link.