I like the idea of Bitcoin quite a bit, mainly because I like the idea of being able to send money to someone else at a distance without having to involve a third party (ie a bank). Visa, Mastercard, and Paypal suspending donations to Wikileaks at the behest of the US (and probably other) government made me like this idea even more.
Bitcoin also seems to have a few problems right now. The biggest problem seems to be that a lot of bitcoins are owned by speculators who are simply sitting on them. The other is that not too many places are willing to accept bitcoins as a form of payment. If I had a need for alpaca socks or marijuana (and the balls to have it shipped to my house) I could possibly get what I needed. Aside from that, I'll be stuck using US Dollars.
I am not deeply invested in Bitcoin, and have no plans to be. If I see something I can use being sold for Bitcoins, I'll buy it. I will also accept them for anything I have for sale. I won't be doing anything else to try and spread their use.