If you want to make simple podcasts or sound scene tours on the move and on the cheap then read on. Buy one of them there portable mini-disc players Amazon are advertising them for £40 and get a mic that can plug into a micro jack socket and you're in business. Once you have recorded your podcast you will need to play it back into the PC and digitize it unless you go for one of the more fancy models that can link to a PC with a cradle.

I created a podcast using this method the other day and was very happy with the results.