TrashyMG,
I'm guessing if there is a Pandora2 it'll be based off of a tablet / cell "mobo"/chipset that already exists and has Android running on it, so all the driver development is done. Pure conjecture on my part. This hypothetical beast would be differentiated by the controls - and possibly keyboard - on the Pandora2. The original vendor's product would be a more traditional slate or phone.
The "ideal" solution would be a successor chipset to the current Pandora - aka another binary compatible version of OMAP, or something that just needs a translation layer like the layer that allows us to run GP2X F200 stuff on the Pandora - that also runs Android and a standard distro like Angstrom, Ubuntu, so you get:
1. Android out of the box
2. A Linux that has a larger development community out of the box. The Pandora community has done a huge amount of work that shouldn't be poo pooed on the current Pandora's firmware, but if a standard Linux ran on the Pandora2 out of the box, so much the better. (And ubuntu / kubuntu seem to be trying to make inroads to the tablet market so this isn't entirely out of the realm of possibility.)
3. Backwards compatible with the Pandora1 so all the work already done for the current gen system doesn't go out the door with the next gen.
I don't know how realistic this is, what time frames, if any, Craig is looking at. Heck, I don't even know what he even envisions as a Pandora2. I haven't been in the forums nearly as much of late, but I haven't heard him commit to the current DS style clamshell, a tablet, or anything else - but I could've easily have missed this.
If the Pandora2 used an entirely different chipset, say the TegraX, then at the least everything compiled for the Pandora1 would need to be recompiled to run on the Pandora2. At worst, if Linux isn't fully developed for it, then things would have to be converted to run in an Android environment.
Edit: It's the Spark Linux tablet I was thinking of running KDE - not Ubuntu or Kubuntu, but it seems like Ubuntu's been trying to get things "lighter" so it'd run decently on a tablet.