Hi, as you can see from my portfolio I have a considerable amount of experience developing applications under Linux, including on touch-friendly embedded platforms. I also have prior experience with Angstrom and the OpenEmbedded build system from their usage on Sharp Zaurus devices. I would propose developing the application using the QT and QML framework to allow for rapid development of an attractive and touch friendly UI (I've used QT in the past for touch-friendly projects on the MeeGo and Mer platforms), however I'd also be perfectly comfortable developing the application using GTK (I used to be a core developer on the Jokosher audio editor which involved many custom GTK components, so I'm also very familiar wtih GTK). Thanks for considering my bid.