A final list. And one of my favorites as an English teacher.
Writing in the Disciplines.
These colleges typically make writing a priority at all levels of instruction and across the curriculum. Students are encouraged to produce and refine various forms of writing for a range of audiences in different disciplines.
Brown University
Carleton College
Clemson University
Colorado State University
Cornell University
Duke University
George Mason University
Hamilton College
Harvard University
Miami University - Oxford
Middlebury College
North Carolina State U - Raleigh
Princeton University
Purdue University
University of California - Davis
University of Iowa
Washington State University