I was thinking about this more as I was getting out of bed this morning...
The flip side of hiring artists is getting them to commit to your enterprise full time. Let's take the guy in the article that Jon posted. He's a startup and needed a part-time customer service rep. Let's say his company grows to the point where he needs a full time customer service rep, or grows to the point where he needs a full time customer service manager. Will the artist he hired come along for the ride?
It seems like no amount of money would dissuade the artist from giving up his passion. It seems like the entrepreneur would have to hire someone else--someone who hasn't been dealing with his customers and thus is not nearly as knowledgable.
Basically, you can hire artists, but can you grow with artists?