I run a web design / hosting / custom software business. I host about 45 sites for ~30 clients. I'm trying to switch more to the custom software / business solutions side of things but its tough to break into.
My dad and I co-operate a T-shirt site. He comes up with basic designs, I fix 'em up, and pump 'em through illustrator. I'm working on designing the site right now. Again, he's helping with layout, I'm doing graphic design and programming. He gets the shirts printed, handles all the financial stuff, advertisement and all that. The site isn't up yet, but we have the domain.
I've met a few over the few years I sold my wares... they stopped in to some of the local warehouses film companys... don't know what you'd actually call these places... I was in awe the first time, but well for me watching porn kinda deadened me to... I guess what you see in a woman that makes you think she is attractive... so after awhile it was like you know so and so... works for Sin City, yeah, yeah.
Freelance, mostly when I have time now that I've got a full-time thing. But even before this, I'd hesitate to call it a "business," that'd require a more substantial amount of money coming my way.