It's funny that this thread popped up again. Just two days ago, out of the blue, I decided to make some homemade fettuccine with lemon zest added to the dough. It turned out to have a nice flavor and messed very little with the texture. All that was detectable was little lumps where the zest was, which would be expected. I made two pounds of pasta and used the zest from one small lemon, which was a bit light for what I was going for. But again...it turned out nice.
I topped it with a traditional Alfredo sauce, compliments to Alfredo di Lelio. I've made pasta a couple of times in the past, but I'm currently trying to force myself to get more comfortable making it. Hopefully to get to the point where I don't hesitate to make fresh pasta/noodles with any dish.
dan
(edit add: OregonYeti, glad your in a more permanent place now

)