I had several dozen small to moderately large machinings that I had made in the past few years, and it was time to get them anodized. On the advice of Adam at SK Grimes, I sent them to Technodic in Providence, RI (which is one of two places that Adam uses).
The internal turnaround was less than a week (plus a week on either side for shipping), and the results were wonderful. The anodizing was deep and even, the parts were carefully packaged, and the price was about 30% less than I had expected, based on past anodizers. Steve Masso answered all my questions fully. They anodize in several colors, plus offer powder coating for water immersion or high-wear parts. They don't do hard-coat anodizing, which should only matter to you if you're making an underwater housing.