Fiat currencies are not evil, but their money supply is out of people's control. Bitcoin, on the other hand, is a currency of the people by the people. Wouldn't you agree that voting with money is much more effective and efficient than voting with ballots or feet? (Money is fuel, so to speak.) If you control the money supply, you get to say what goes and what doesn't for whatever type of economy you are envisioning or trying to build. Having a choice is great, no?
Now, we just need to find a way to keep the market makers out of bitcoin economy... The stench is overbearing!
I can empathize with the uneasiness of money supplies being controlled by central banks (even though, personally, I think the system works reasonably well most of the time). I've posted some ideas on how to keep some of the "people-control" aspect of the money supply in Bitcoin without having to buy into the deflationary mindset here, and I'd love it if you or anyone else on this thread could spare a few minutes to comment:
http://forum.bitcoin.org/index.php?topic=29252.0