Valve's "Steam Controller" behaves strangely

Just a heads up to anyone who wants to play with these on Linux. They do
NOT behave as a normal gamepad, they don't present a JS0 interface and the
events are a little wonky.

They do present the axis/buttons data in the 'hidraw' stream, so there is
some hope that we can support them. If anyone wants to collaborate, drop
me a note.
--
# hexdump -v -e '64/1 "%02x " "\n"' < /dev/hidraw1
01 00 01 3c 22 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
47 a7 c2 bc fa 9f 13 54 80 0a f6 df e5 3f
01 00 01 3c 23 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
47 a7 c2 bc fa 9f 13 54 80 0a f6 df e5 3f
--

Attached are some quick notes from 15mins playing with the device.
Cheers,
Simon.