<li>An excellent collection of <a href="http://www.hifi-remote.com/sony/">Sony command codes</a>
+<li>An in-depth investigation of the <a href="http://www.adrian-kingston.com/IRFormatPioneer.htm">Pioneer IR Protocol</a>
+
<li>Link to (what appears to be) source code for the N900's
<a href="http://svn.jacekowski.org/host_mode/trunk/drivers/input/lirc/lirc_rx51.c">/dev/lirc0 device driver</a>.