It's not perfect, but if you're learning Android UI, check out http://droiddraw.org/. It's a WYSIWYG interface editor, like Interface Builder. It's not pretty, but I found it to be a good way to understand the fundamentals.
I honestly plan on seeing if CS5 can create anything serviceable as a UI for business apps. I can honestly see adobe going on the warpath there after this bullshit and now they have all the iPhone platform compatibility guys with nothing to do.
If that fails, droiddraw looks like a possibility. I just tried it out. Would need to test it further, but has promise.
