sole proprietor? Sounds like you own a store on Main Street that sells household wares.

business owner = also lame

that's the term the government makes yu use when you register your biz in CAD.

seriously, there is no good term. Producer? too hollywood.

Plurkerpreneur?

opportunity seeker

non 9-5er

entrepreneur is probably the best word

pimp works, too.

Entrepreducer

we got words for the "sheep", the "shepherds", but not for the lone wolf life artists.

gainfully solo or gainfully alone?