Per discussion at Audio WG f2f 2013-03-26
Add informative note on why the PannerNode is limited to 2 channels, and point to equivalent methods for multi-channel panning using split/merge and ScriptProcessorNode.
Web Audio API issues have been migrated to Github.
Closing. See https://github.com/WebAudio/web-audio-api/issues for up to date list of issues for the Web Audio API.