Index of tutorials for audio recording:
Allisons Mixer Mic Setup (not using any more actually!)
Audacity Setup for Podcasting
Fix Skype Dropouts with Automator Scripts by Connor
Garageband ‘09 Get Rid of Reverb
How to Record a Skype Conversation
How to Record Two People on Skype Video
Record Two Mics Without a Mixer – GarageBand + Soundflower + Audio Hijack Pro
Record Two Mics Without a MIxer – WireTap Studio