Just one monitor at a time. I first tried a Dell 2408WFP via DVI and then a AOC e1649Fwu via USB. In both cases I couldn’t even drag a windows explorer window over to the external monitor without severe lag. To make sure it wasn’t the tablet being overloaded, I removed the Pro8, then added a dell USB dongle to the stream’s micro-usb (http://accessories.dell.com/sna/produ…) then attached the AOC monitor to the dongle, which worked perfectly. As best as I can tell it was choppy no matter what I did. The one odd thing to note is that while window refresh seemed crazy slow, the mouse tracking was much faster (it wasn’t perfect, but much better).
I’d compare the performance to an RDP session over a slow LAN connection, if that helps.
Thanks for your help!