Hi, I develop a collaborative business application on a multi-touch device like Microsoft Surface. However to my mind every collaborative application on a multi-touch device was made to share photos, to draw, to play, or for one person at time.
So, I have no reference and I'm having a hard time to imagine how multiple users can work on the same user interface, or how they should interact with my application.
My question is : do you know some blogs/books/links/authors which talks about design and interaction pattern on collaborative multi-touch device ? (To me collaborative means "multiple users at time").