@evoorhees: It's not that I don't know how to accept bitcoin as payment, but rather that in order to accept bitcoins, I first need to have the capital to purchase the rings with regular currency. The rings are then shipped to me (usually within about 3 weeks), and I need to ship them on to customers that wish to purchase using BTC. I have done this and lost a fair amount of money in the process due to BTC price fluctuations, and I simply can't afford to lose any more money in the same way. If people buy in Dollars or Euros from Shapeways, the rings get shipped straight to them without me having to act as the middleman and risk losing money due to price fluctuations, and I don't have to cover the unnecessary cost of extra shipping - it works out way cheaper for the buyers that way.
I realise that very few people are going to want to buy a bitcoin ring with Dollars or Euros, and that is why I haven't been promoting them. In retrospect, it probably wasn't the most well thought out business venture, granted, but it is what it is, and for the moment the rings are available from Shapeways for Dollars or Euros, and they may or may not be available for purchase in BTC in the future - I can't make any promises.
If you want to make a business of it, and even sell other things, you should look at Bit-pay.com - they take care of the fluctuation risk for you, for a ~3% fee. Customer sends bitcoins, you get cash in your bank.