Thanks, what a wonderful answer.

I do not intend to use BitCoins to evade Tax. That would undermine a global system that at the moment has no recourse but taxes. I am South African, so not 100% familiar with the US taxation laws, but doubt very much they are different to our own.

The main reason I asked what I asked, is because I am currently writing about How to get to a world without a credit-based economic system. Bitcoin fits every requirement for acatalyst to Unified Global Autonomous Resource Based Economy, and the elimination of the trust factor is a stroke of genius.
Someone needs to write a layman's explanation of BitCoin and spread it into other systems. In that one stroke could come the end to many global inadequacies, from resource mis-management, to war, poverty hunger, health care and even education. for a summary of the work I am busy with, please see my blog pages under the pseudonym Rob Cayman : http://therantingsofrob.blogspot.com/2011/05/getting-to-a-better-world-without-money.html
and
http://therantingsofrob.blogspot.com/2011/05/getting-to-a-better-world-without-money.html

I promise that they are good reads even if my thinking is flawed.

I am definitely using and spreading the BitCoin concept!!! Awesome!!!