Comment Analog sci-fi mag (Score 2, Interesting) 30
Analog Science Fiction & Fact runs 3 to 4 part serials pretty regularly. I don't know whether the sum of the parts would be the length of a full-blown novel, but it's something. It's a pretty effective gimmick to keep me subscribing, especially when they run a really good serial, like "Shootout at the Nokai Corral" by Rajnar Vajra.