At this time UDP optimization is not natively supported by the Steelhead. As per Bob's post please do indicate in the Feature Requests forum if this feature interests you.
I do note from a quick google, though, that PCoIP has been criticised for sending bitmap/raster data instead of the graphics primitives used by Citrix and RDP. This appears to result in a much higher bandwidth utilization due to the nature of the protocol.
If your terminal servers and clients are able to support Citrix or RDP you may be able to save some bandwidth by the technology switch before even considering optimization.
