[davvid]

If you don't mind going low tech you don't need the split keyboard. Just use two usb keyboards, one for each hand. You can actually get quite productive that way. I did this for a while before discovering kinesis keyboards.

The downside is that it takes up more space, but it can be quite comfortable.

[edwinyzh]

Yes, I have just discovered this recently, but the right hand mouse is still too far away.