You know, I've been trying out various Android IR control apps, and most of them have already stolen your idea. In fact, HTC's default IR app works in exactly the manner you describe (perhaps you've already seen it?). I'm not sure how much effort it would take to implement, but I'd love to give it a try. (I'm still knee-deep in fighting Qt-Android UI issues, but once I get over those, I should be able to get back to serious work...)

Talking about UI issues, I've been spending far too much time trying to get Qt Stylesheets working on Android. For the most part, they work fine, but for a few items (particularly for my finger-flickable tabs), I just can't get them to lay out borders correctly. However, I think I could separate tabs in a different way -- say, by color-coding them. I'm not really sure about this idea; I think people might find it useful, but I also like the fact that the generally monochrome color scheme used currently by Pierogi allows you to concentrate on the target device rather than having the phone distracting you. (Also, it seems less likely to interfere with the theme you choose for your phone.)

I guess my question (to anyone reading this) is, would you find the addition of color to the UI useful?

Also, while I'm here, let me post my latest iteration of the Pierogi icon; please tell me what you think about it.

EDIT: Added the N900-sized icon for comparison purposes.