flash memory stick hack

Anybody out there hacked any of these flash memory sticks coming out? I'm looking to record audio on flash memory (can be chips, I don't care)
and play it back with a PIC. I'll probably need between 1 and 2 megs.
As I looked around for flash memory chips, they were typically all way too small. Then I thought about these Sony memory sticks I got as end-of-run deals; 2 meg sticks for dirt cheap. Anybody figured out how to read and write to them?
Other suggestions welcome; I could hack a CD rom or a CD walkman as well, which I'll probably do as a "plan b". Just have the PIC play the appropriate track at the appropriate time.
Ian
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I'm currently developing a system for a client that plays 4Mbit (512kbytes) of sound from a PIC.
I found some large flash chips in Farnell's (they are actually only 8-pins). They use a 20MHz SPI link (so few IO lines needed) and they also do the same chips packaged in a card (I believe they also do the card holder). If you find the chips (there in with the flash memory) on the Farnell web site you can also download the data sheets.
As way of a foot note; I hope you are using the BTc technique. It works well and provides a staggering 8:1 compression ratio.
Regards,
Geoffrey.

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