First, let me say I think it is great that this ad is running here, it means that this site is hopefully making a little money off this forum.
Second, I am amazed at how cheap 3D prototyping and prototyping equipment is becoming I've seen the printers for as low as 495 USD. It won't be long now before we are all not just sending emails to each other, but objects as well. I see a great opportunity for advertisers doing this. Anyone who has a fax machine knows how irritating it can be recieving a fax for a paid vacation or any other add, but can you imagine how cool it would be to recieve a fax with a 3D model of the product! Of course the thrill would quickly end just as soon as you had to replace the material in your printer that was used up by the last ad you recieved.