I got a nice comment about my Citizen Journalism Tech Kit 001 from Adam at baffledexperts.com. I checked out his site and he has several great tutorials on mics, headphones, mini-disc recorders, digital recorders, etc., etc. Check them out!
Tutorials at baffledexperts.com
Earphones – a.k.a. headphones, cans, earbuds…
Mini-Disc Recorders – nice info on the mini-disc format and the recorders that record on them. Adam also tells ya how to get the audio off of the mini-disc and into your computer. (where it has to be to become a MP3 and a podcast 
Digital Recorders – cool new pro audio recorders put digital info on CF cards like the ones used for digital cameras. For example: the Marantz PMD660, Marantz PMD671, and the Edirol R-1.
Podcasting with *any* website – a lot of blgos have plug-ins that do this, but Adam shows you a neat script that will do the backend tech of podcasting for any website!