Looks like this topic is dead, but maybe it has a breath of life left, so I'll check. So, adding my two cents,
My wish isn't for an app per-se, but a way of dealing with apps that assume you're running on phone. I've come across so many apps that make this assumption in various ways, e.g., by using a fixed-size tiny font, by forcing portrait orientation, and a bunch of other things which I'm sure you all have experienced.
I'm not wishing for a tablet-specific UI, just a way to make apps at least somewhat usable on a tablet. So, for example, let's talk about small font sizes. A lot of apps lack basic font-size controls, including Google's own Google Plus. The text is tiny. And scaling up in compatibility mode stinks, because everything gets ridiculously pixellated. So, how about either a font-size changer (for the app, not a global one, since I have other apps which do things right which I don't want to break), or an intermediate zoom level for compatibility view. Doesn't seen too much to ask, does it?
- ems