Tim forwarded your email to me. We agree with you. Our emoji characters are based on the Unicode standard, which is necessary for them to be displayed properly across many platforms. There needs to be more diversity in the emoji character set, and we have been working closely with the Unicode Consortium in an effort to update the standard.
It’s a good question — it seems that no, they’re not. As you can see here, companies like Mercedes are not only leaving these screens open for use with their own systems, they’re also leaving them open to Android in the future (though details aren’t clear there).
All of this sort of led to my reference to the Rokr. We’ll see how well Apple likes playing on other’s hardware. They do it a bit with the Apple TV, but as you note, this is someone else’s touchscreen.
1) It’s very well done. Some of the design seems a bit heavy-handed at times, but it’s responsive and sleek.
2) I’ve already replaced the standard Facebook app on my phone with Paper. It has basically everything you need from Facebook except Events, which you have to assume is another one of the stand-alone apps they’re working on.