I recently got a blue microphones snowball mic. the snowball is an omnidirectional USB microphone with a built-in soundcard, so you only need a usb port for it to work.
its an excellent mic for podcasting and the like, so I thought that id put up a review of it.
1) the packaging is excellent.
2) it has an amazing stand. it will work with all mics :D
Cool idea of having soundcard in the mic. Good for podcasts as you mentioned and for ease of use and handyness. Not sure about the quality though as it only supports up to 16bit 44.1kHz.
How much is it?
right now its £50 in maplin electronics