The documentation (1) says about camera's start_finder:

camera.start_finder(callable [, backlight_on=1, size=main_pane_size ])
But not a word about the 2nd camera (front camera in my N82).
Is it currently possible to use start_finder() only with the 1st camera?

Could it be possible to select the camera in the start_finder()-call like it is possible in take_photo() (6th parameter, "position=(0|1)".

BTW, when start_finder() is running, Nokia Energy profiler tells that power consumption is 1.8 watts, but probably reading camera's cell is quite a processor intensive job?

[1] PythonForS60_1_4_3_doc.pdf
5.3 camera — Interface for taking photographs and video recording