Anandtech is looking at the 3DLabs Wildcat Realizm 300 multi-GPU setup today.  They only test SPECviewperf, so you might not get a whole lot of this for an enthusiast user. 
We are very interested in comparing this solution to NVIDIA’s SLI option. If NVIDIA is able to adapt their SLI profiles to workstation applications effectively, we could see some very impressive numbers. NVIDIA isn’t choosing to focus on performance as the main selling point of Quadro SLI though. They prefer to highlight the added features of the solution. The major advantages here are the massive display capabilities. We will be sure to pay attention to these key features as soon as we get our hands on a driver to test the system.