I'm so glad I found your topic. I've recently been wondering what regulations the governments have placed on these online investments. Since I've been regularly trading and selling/withdrawing from Coinbase recently I need to know about any documents that should be filed with local or federal government.
Not long ago I saw a comment on Coinbase turning over information to the government on Bitcoin transactions along with a warning that users had to file a document before or after doing Bitcoin transactions. Needless to say, this is all a confusing mixture of what you should or should not do when it comes to crypto-coins

I'll continue to monitor topics such as this one for more informed information about where to go or google for information updates.