Windows 8 phone for sure, but I don't know about anything prior to that version. We are making an effort to have a version for anything we can imagine though. This includes phone/ipod and tablet screen sizes.
As far as Xbox and other PC platforms, it is possible to do so. The development build is based on PC, and ported to other devices with the same engine. The only issue for PC is that we would need a distributor like Steam, and for Xbox Live we would need Microsoft approval.
However since Microsoft approached us to ask if we would publish the game on the Windows 8 App Store it's possible we could have a shot at Xbox Live, especially since Windows 8 has Xbox Live login integration for many of the games on it such as Jetpack Joyride.
As for Steam, we will be attempting a Greenlight. The issue we are likely to face is Valve's own reluctance to allow "iOS ports" on Steam, so I am not holding my breath or counting on it. It doesn't hurt anything to try though.
I always thought it would work well for the WiiU as well, especially considering that you have the controller touch screen and could play it on there in 'off screen' mode holding the controller sideways. Nintendo has recently revised their criteria for allowing indie studios to publish as well, making it very possible. 3DS wouldn't be out of the question either.
Of course, I can't confirm anything, and it's hard to say who will and will not accept us on their systems, but of course we will try to at least reach out and see if we can.