And now the rebuttle:
PLUS:
*Lightweight
*Unencumbered movement
*No mic stand to tip over, or band your teeth
MINUS:
*coughs, sneezes and other unwanted noises get amplified(can't turn away from it)
*Less bass response and no proximity effect
(usefull with proper technique)
*IMO much uglier than the mic in front of the face - makes me think of an aerobics teacher. I thought Garth and Madonna both looked rediculous in theirs. Unless you can get the teeny-tiniest one in your own flesh color .... I'd stay away
* Inability to "work the mic" for dynamic changes and vocal effects

Just more food for thougt