It's been asked for, and nothing has been forthcoming, so maybe it's not so easy (or not interesting to any Maemo developers).

I wanted something very similar and posted a request in this thread, "Will someone code an Always-on-Top Macro-Typing Applet like TypeItIn?"

In Diablo, I use the suggestion offered in that thread by Benson: combine xautomation's xte function with Personal Menu. I detailed the solution in this thread, "How To: Making your own Form Filler or Macro Typer".