This is a really cool link. It has lots of recipes for flavored/colored pasta dough and various methods for making the dough - and much much more. It is very similar to the Pasta book I like that includes beet, spinach, lemon, garlic, herbs, sqid, chocolate flavored dough, etc. I took it down from the shelf and it's actually called The Good Cook - Pasta (Techniques and Recipes) - Time/Life Books. The machine I have is an Imperia. I could look through the book and see what else I can find. There's a killer lasagna with both a meat and white sauce made with Spinach dough/noodles.
I've wanted to try the tomato dough... someday, I hope.