I just did a show back in November with the OT running the following rig:
Octatrack
Analog Four
Novation UltraNova
Korg EMX1
Eurorack Modular
Manakin Schrittmacher
iPad
Here is a photo of the setup (Please excuse the overweight synth nerd in the middle)
http://www.transistorchicago.com/photos/1823/photo
It worked pretty well!. The OT acted as clock and the EMX, Eurorack and iPad were routed through it. There was a Mackie 1202 mixer that was used to mix everything else.
I wish the OT had 8 inputs instead of 4. If it did, I could knock the Mackie out of the setup. One can always dream.