How much HDD space is needed for...
 

...recording a hour of audio from a microphone (or 2, split into one)?

Thanks.

a minute of stereo sound at 44.1 is usually about 10mb raw .wav

Here is a chart giving the capacity required for the various formats and sampling rates.

http://www.sounddevices.com/tech/recordtime.htm

While you're there, browse the equipment. Nice stuff!