OP, Good for you!
I sent Getty Research Institute a 33 page, sample hand printed portion of my 157 page limited eidtion hand printed book for approval. They would never answer my emails, so I knocked on their door with a protoype of the book.
After a few months it came back with a stamp on the box stating 'X Ray - Passed GRI' and a letter inside saying NO thanks...book is outside of scope.
This was a gift of a $4800 limited edtion book that is in the special collections of Oxford, Columbia, British Library, V & A UK, Berkely, Rutgers, RISD, Amherst, ICP, CA State Library Archives Sacramento and on and on. Getty said no thanks to it for free.
If they knocked on your door wonderful! I couldn't get anywhere with Getty even after breast feeding it to them.
The 2 favoite excuses for rejection from museums are: 'outside of scope' (collecting mission) and 'out of room.'
Post up some of the pix they picked out. We would like to see them. i looked at some of your stuff, but Flickr is pretty slow. What i saw was nice.