Ariane,
My experience has been that larger institutions require an advanced
degree for most professional positions.  For curatorial, they prefer a
Ph.D. or an MA (at a minimum).  I still think that there are
opportunities in smaller musuems--where they are willing to train you.

(My thoughts)
The industry is changing and the requirements for museum jobs seem be be
more demanding.  Additionally, there is a new breed of museum
professional that is knowledgeable in areas other than academia---i.e.,
fundraising, financials, community, etc.

Regards,
Jose
--
Jose A. Ortiz
Assistant Manager, The Cloisters
A branch of the Metropolitan Museum of Art
Tel. (212) 650-2289