You can have a look at the tracker-search-tool from tracker 0.6.95. It´s here: http://git.gnome.org/cgit/tracker/tr...0c5131c19778a7 and it´s written in C. First step would be to make it compile inside the SDK, then you could start adapting the UI.

Another option is to write something from scratch (maybe using python) and talk to tracker via it´s DBus API.

I´m not a tracker expert. So read this more as general advice. There is also a tracker mailing list with helpful people. Some of them working for Maemo/Nokia.