Larry Rinder, curator of 20th century art, at the University Art Museum at
University of California Berkeley is now experimenting with some new
technology for use as a multi-level, non-linear gallery guide. Their main
number is (510) 642-1400.

You might also try Peter  Samis or John Weber at the San Francisco Museum of
Modern Art 415-357-4073. They have produced interactive gallery guides with
the help of a Bay Area  company called Antennae Theatre who produce guides
for museums around the US. Good luck.

Marnie Burke
Museum Management Consultants