http://blog.livedoor.jp/puglypekepon/archives/50869211.html
http://wiki.bluez.org/wiki/Architecture
http://bluez.cvs.sourceforge.net/*checkout*/bluez/utils/audio/audio-api.txt
http://d.hatena.ne.jp/sasakyh/20081225
http://blog.net-sk.com/sk/archives/2007/09/bluetooth.html