This weekend I ran a session called The BarCamper's Guide to Bitcoin at BarCamp Nottingham
(that's in the UK, in case there's a more famous Nottingham in the US).
Slides, references, and a little background are on my blog: http://aviewfromafar.net/the-barcampers-guide-to-bitcoin
I only half-know what I'm talking about regarding the Bitcoin protocol (and economics, for that matter), so feedback and corrections are welcome :-)
Quite a few people people turned up to the session. I showed some live trading after, which started a very long discussion about traceability of transactions (we spent a while on the Block Explorer too). I've learnt that once someone is interesting in figuring out what you can do with the information in the Bitcoin network, it's easy to talk literally for several hours about it!
"(that's in the UK, in case there's a more famous Nottingham in the US)"
Not yet more famous than the Nottingham in the U.k., but when these two guys cash in their bitcoins, Nottingham, Indiana, will be a premier (secret).