I recently read a really good article at FastCompany titled The Insanity of Bitcoin Explained. Basically Bitcoin is intend to be a kind of universal (and stable) digital currency. So far, it's biggest claim to fame has been it's use for shady dealings and anonymous drug purchases. However, it is starting to gain traction and be accepted as currency in more and more legitimate business. in any case, it is a fascinating concept and implementation. Imagine, a currency not base on gold, but on complex math and encryption.
I still don't fully understand it all, but this video is a good primer and possibly a bit of a glimpse into our financial futures.