MD links:
minidisc.org the official MD community
MiniDisc T-Station very nice site with lot of MD releated informations

Linux links:
Freshmeat (download application)
Mandrake Homepage (my favourite ditribution)

Similar projects:
MD Interface (Sony MD portable titling software for windows)

PIC programmers:
Ponyprog. In my opinion the best programmer available free on the net.

more links coming...