Sound controlled high speed photography

Hi

im very new to arduino, i just read the Getting Started with Arduino and think im getting the hang of it.

Anyway i was looking to build a high speed camera control using a microphone like what was done in the interfacing with hardware section of the playground (i cant post links yet) , unfortunately this link is dead.

Basically, what microphone do i need, i have a few pc ones knocking about will they work,

Does the microphone input need to be amplified, can the arduino do this itself?

http://www.glacialwanderer.com/hobbyrobotics/?p=167