I've started to develop a control application in Flash. It's in AS3 and uses the RCP to connect to the device. I'm sharing the sources so anyone can have a go with it. It's a loooong way from being something, let alone finished! At the moment one can use the on|standby, basic controls and volume.
Let me know if you're also busy, or updated/used these sources to create something cool!
Find it on my blog: http://www.josfaber.nl/blog/?p=49