Will get back when I have something more concrete to show in the way of scripts.In the mean time this is how I have got it working.
I have 3 Mac Pro server nodes each is a 2 x 2.4Ghz dual core so I have effectively 12 nodes for rendering. You need to install Qmaster.app on each server. You get this on the FCP or Compressor disc.
I then set up 1 server to run as a Manager and Service. Setting it up to run using one instance this then spreads rendering of a clip across all 4 cores evenly. The other 2 I set to run just as a service again running as 1 instance on each. So when you sent out to render more than one clip it will render 3 at a time farming each one out to each server. I was getting around 106 frames at HD per minute so over 3 servers that is 318 frames per minute. So thats around 4.7 x realtime at 25fps.
You can run with a setup of 4 instances on each server that allows you to render out 4 clips per server on a 4 core machine but I found it reduces performance significantly although I render out more clips at once I get less frames overall over the same duration.