Yes, it's a rather unintuitive arrow key arrangement, though it might be a bit faster as soon as you got used to it and have your fingers moved to the correct position, as there is no fingersliding required to go from up- to down-arrow.
Personally I don't see the lack of right Ctrl and right Alt as a problem. I'm routinely mapping right Alt to Caps Lock anyway, and I never in my life felt the need to use right Ctrl. So I guess if the keys feel alright, it might turn out to be a rather nice keyboard. I'm thinking about having the case sandblasted and clearcoat it for the all-aluminium look, or perhaps repaint it - in any way I don't think it'll stay in that particular shade of green for long.
Let's see about that trackball, the mentioned thread makes me think there might not be too many chances to have it recognized by modern OS'es (linux excluded) without rather complicated driver hacks, and it's not like I really need one anyway.
Perhaps there might be an absurd tenkeyless-conversion in the future of that thing... the aim would be a rather compact yet heavy and sturdy keyboard that I could take with me in my backpack whereever I go without fearing for its structural integrity - and yes, the quality of those keyboards on the public computers in my University would justify exactly that sort of thing.
Edit: No can do, looking at the photo of the internals again - it seems like the controller sits right above the numblock.
Chris