A cheap add-on device, you mean? If so, any release of code from the noBounds research project isn't going to be very helpful. There's also no after-sales accessories market for the tablets, so it'd have to be homebrew building or Nokai developing and selling it.

But as is pointed out by mikkov, this is using a PC. Just plug the Nokia in as a USB Mass Storage Device and play it on the PC. noBounds doesn't seem to redirect the tablet's video output any better than VNC would, and other acceleration solely comes from using specialised software. So for video, you can already play it back using the external device.

In fact, I can sell that external device to you *right now* for only £150 ($299 or less!): it's an Asus Eee PC 701.