kroth... I, too, find this to be a very interesting topic. Have you read the book Everyone Here Spoke Sign Language: Hereditary Deafness on Martha's Vineyard? It's a fascinating book, and a little sad (as the use of the language - and its users - decreased in number).
As someone with a layman's interest in linguistics, I also found the information in the book about the various influences of other kinds of sign language on the MV sign language to be intriguing.
If you haven't read it, I highly encourage you to try to get your hands on a copy. Especially if you're writing a paper on the subject.