My Waterford (1997) and my Giant (1980-something) have quill stems, my newer bikes (Kona Smoke 2007 and Surly CC 2007) have the new-fangled threadless thingies. I had to buy a new stem to adjust the position of my Surly's bars at all, which just chapped my hide somethin' fierce, let me tell ya!

Some of the quill stems are sculptural beauties, too. Like the Nitto Technomic and the Nitto lugged. Peter White has a nice selection of hard-to-find quill stems on this page: http://www.peterwhitecycles.com/stems.asp

sigh. so pretty...