If your looking for a good solution for recording a podcast — mac or windows — don’t go any further than audacity, an open source tool for recording and editing audio. You can export into mp3 format using the lame encoder. I tried about a million tools over the weekend, and even ended up using a trial of Adobe’s Audition. Nothing recorded better than audacity, though they all had significant more resources devoted to podcasts.
My advice? Use audacity for recording, editing, and saving. Use a sound folder structure on your PC/Mac for keeping track of your files, and keep it simple.