What I meant is that when you launch the application it does not tell you how to interact with it. Instead you see 2 big icons both in a different colour (for whatever reason). See attached screenshot. I don't remember this problem from either Quicksilver or GNOME-Do.
After one figured one has to type the application starts to search using its plugins. We already have Tracker as database on Maemo, I'm not sure this application uses that database, but if not maybe instead of double work its better to interact with Tracker directly.