Liberal arts like geography, anthropology and philosophy give you an excellent foundation for information architecture, business ethnography, user research and business analysis. A startup that's doing customer development instead of building something arbitrary should find those skills invaluable as long as you present them the right way.

EDIT: I graduated as a Geography major, with the pitch being that cartography is a very skilled form of information architecture and interaction design, as we use maps both as art and as a useful, tailored tool; geographic information systems mean I have experience working with demographics, statistics and spatial analysis; multiple anthropology courses mean I can research and present analyses on both the developing internal business structure and on our customers; philosophy means I can think critically.