Developers have been shown it, and as I said, if the development kit is close to the Gamecube's as has been said then they can be doing the ground work for games and then improve it once they get the Revolution development kits. The first party titles shouldn't be too affected by the controller's final form not being finished. Features of the controller are likely to be totally finalised, I'm thinking they're just getting the ergonomics of the thing right now.
Agreed. The basics of the controller should be already shown to developers so they can work on the ground work of their games and finalise them towards the release of the Revolution. I'm sure Nintendo have already finished or nearly finished developing the Revolution's controller and just need to finalise it.