Here is one plug and play unit from Shure that allows just that.
http://music1online.com/a96f.html
Principle:Shure A96F Transformer
Transform your microphone into a computer microphone or into a microphone for video applications.
Low Z, Female XLR to Medium Z Mini Plug.
Low to medium impedance microphone transformer with mini-plug output connector. Adapts a balanced, low-impedance microphone to camcorder/recorder and computer sound card input. 3-pin XLR female input connector. 2-circuit, 3.5mm mini-plug output connector with 18-inch (45 cm) cable.

Other linx of interest: (recording)
http://www.shure.com/booklets/default.htm
http://www.shure.com/support/technotes/ ... tical.html
R