I love my MD recorder... But I have no experience plugging a mic into it... I mostly run it "line out" from the soundboard at gigs...But I'm sure ghosting around Sonys website, or the... hang on a sec... I got a good link I think...
*sounds of shuffling paper*
Ya... try Minidisc.Org especially the gear pages... I'd imagine there's some good leads there!
;-)