Onkyo Remote Software Control
So I’ve bitten the bullet and bought a new AV Receive, an Onkyo TX-NR1007. Amongst other things, it is can be controlled via both RS-232 and Network (using more or less the same protocol). So instead of actually testing the receiver, I’ve spent most my time so far writing an application to control it from my desktop 
It’s in a very early stage, but seems to be working so far. If you’re interested, you can find the latest details and versions here: http://michaelauerswald.de/tools/oyremote/ (or under the Tools menu on top)
