Yes and I am earning money with it (Score 2)

Yes I have taken the plunge and I am earning money with it. But not with one of those really cheap printers . Have a close look at the quality that most printers give you and most are just disappointing. But there are some very good printers which allow you to start printing immediately and have good result for a bit more money, (mine was $1900).

Be aware: when evaluating 3D printers just know that they are in the matrix-printer phase: yes they work, but are slow and results vary widely.
Also have a good look at the surface finish of the different planes: side, bottom and top have different qualities due to the nature of FDM printing.

Printers that are up to par imo: The Up and the Zortrax M200. Below par: Makerbot, most repraps.

I own a Zortrax printer and I am satisfied with the results. I deliver series of small parts to a company that I happen to know (and earned about 350 euros with it sofar, delivering about 150 items). They could order at Shapeways too, but I am cheaper and deliver faster.
FYI: 2 weeks after I placed my order Shapeways sent me an enthusiastic email : "We started printing your order!". They have a production problem. It appears that their printer-manufacturer can not deliver enough of the needed printers to keep up with increasing demand. So it is not so difficult competing with that : ).

I hooked up at 3DHubs aswell to do printjobs for others, but I am not sure yet if that is worth the trouble for the money that it earns. Maybe I need bigger printjobs / need to set the setup cost higher and cost per cm2 lower.

Next to that I designed some small objects and I am working at selling them to local retailers as promotional gifts, they are interrested, but I still need to strike a deal.
My conclusion sofar: although 3D printing is perfect for customization, for earning money: print small series. That makes it worthwhile.

Rob.