lorax - 2:20 am on Nov 2, 2012 (gmt 0)

I don't know if you have to be a legal business here in the United States (I think so) but I think you'd WANT to be for the protection it may offer you from lawsuits.

The actual legal structure you do business as really depends upon your location (country, province/state, and sometimes even city/town). I would check with a lawyer before you move forward.