I got this idea while driving to work...

There's perl module called X11::GUITest. It can be used for testing X11 applications by sending keyboard events. I was wondering, would it be possible to build an hildon application that activate the virtual keyboard and send the keys to (for example) the citrix client?

The perl module is relying on the X library. It shouldn't be hard to extract the function calls from there. (So we don't need to install perl)