Chichipiru's adventures to find the perfect designer light fixture gave me the idea to search the same theme from the diy point of view.
Olive Tree Girl made this cute light fixture with wire and ribbon and here explains how to do it.
These colorful lights that look like U.F.O.s on a night sky are made of plastic colanders. Click here to read the tutorial.
On Addicted 2 Decorating I found not one but two beautiful projects, one with multi-color straws and one with egg cartons.
On Apartment Therapy you will find the step by step instructions to make a light using branches and another one with coffee cups here.
If you want to learn how to save 11.644 dollars on a designer light read this.
For mood lightιng you could try this panel, although it is supposed to be a holiday project, I think it would look pretty all year.
This is a cool idea, a light made of empty cd cases, but it wasn't possible to find any instructions, maybe you could figure out how it is done. Found on Everyday Sugar.
Michelle Brand makes gorgeous chandeliers from recycled plastic bottle bases. Take a look at the picture, maybe you could try something like this yourself.
And if you have an old chandelier that you hate, there's always hope, don't throw it away before you read here for some inspiration.