Recomended Microphones:

MLI Recommended and supplied Microphone, requires XLR to 1/8" plug adaptor for input to PC:  Shure PG-81
    Also available from MLI with windscreen, gun case and adapter.  $195.

Available at BestBuy Lower Cost Microphone:  Audio Technica ATR-30

Available at RadioShack, Lowest Cost Microphone:  MicroCassete Generic Microphone