Houser
Laeger
Roll Design
I think Sonic might also
and I believe Alba might come out with some... just don't quote me on it
As far as I know, the above companies are the only ones making arms, and Sonic is only making rears. I have heard that Laeger and Roll Design are plus 2, but you would have to call them to confirm.
My 700 will be hopefully be going to Ed Teixeira at Teixeira Tech at the end of August, as long as I have the money. He will be using it to spec out front and rear arms and a stem. Ed makes some great stuff, but it will be a few months out.
Doug