I love the idea of grouping several desks together to create a new workspace. What a fabulous idea! And can I just tell you how much I love the mirrored parsons desk from West Elm? It's a new favorite of mine.
I also just found this mirrored desk from Neiman Marcus Home. (They have some really great items by the way!) The lines of this desk are more traditional but I think it could be really great.
My all-time favorite piece of mirrored furniture is Jillian's mirrored cabinet!