Well, I only ever mention Bitcoin to people when talking about financial stuff, how awesome the internet is, or when I know the person very well and they may possibly care. It feels like how I used to talk about private bittorrent trackers to my friends. They're either amazed or they look at me funny.
I have mostly been trying to skip the whole "how it works" since well... I am one of those geeks where the first thing I did to understand it was go and read the spec. It still took me a while to get all the details straight. Its very easy to look at bitcoin and think "ok so I need to mine coins".... and I think thats actually a hinderance once people see how hard that actually is.
That said, it seems to be a split between people who really, truely don't care, and people who go "hell yes! Fuck the fed! I need to get into this". Not an even split, but a split. Most people don't care, or worry about "how do you get the money back out".
Course, I can't imagine wanting to buy dollars with my precious bitcoins. Why regress?