Professors from these schools appear to be the first to have actively initiated and designed a model CS curriculum for liberal arts colleges:
Williams
Swarthmore
Hamilton
Amherst
Vassar
Washington & Lee
Colgate
Allegheny
Bowdoin
From this group, Hamilton and Amherst have notably open curricula; two current Hamilton professors cowrote a CS textbook that has been used nationally.
(Some information from the Liberal Arts Computer Science Consortium.)