I've been using OZ for some time now (I love it), and since I know that I was searching for a long time for a OZ version that works well with my 5600 I'd like to share it:
It's version 3.3.4. I've never heard of it on any forum, or, in fact, on the OZ site, but it's what I have, and it works like a beaut. A few problems though; alot of packages don't install, not sure why, konsole ipkg-ing doesn't work out, and any time I enter "aqpkg" it starts up the gui..
Oh, and I can't seem to find a media-player.

SL-5600, 2*Kingston 256CF, Socket Ethernet CF, OZ 3.3.4