I heard that some people have been arrested and charged with "transmitting money without a license" for selling Bitcoins.
Does this mean it is illegal for me to sell my Bitcoins?
Its kind of a grey area, but I do think in the US, it still might be illegal. But I don't see anyone getting in serious trouble for it, unless you get involved yourself in a large amount of trades .
However in a lot of other countries, the government just doesn't care.