To use this oil lamp, you'll need:
A wick - I used cotton string about 1/8" thick.
A wick holder - I used a 6-32 stainless T-nut that I got at an Ace Hardware for $.74. Anything will work that is clean metal, about 1/8" diameter inside and 3/16" diameter outside, with a flange.
Fuel - I used olive oil, any vegetable oil will do.
I made an Instructable
with more details.
Sale of this model is on hiatus while Shapeways reboots its ceramic process. As of November 2014 this is predicted to take "a few months". I'm sorry to be vague, it's the best information I have. On the plus side, the upcoming porcelain material is predicted to be generally better and more colorful. Till then!