So this is basically my Idea:

After entering the Camera application, we can normally switch onto the Other mode by clicking on the icon on the screen.
So, let´s say i was taking a picture just now, but i want to record a quick video of someone. To do this, i have to go into the menu and choose what i want to do, in this example going into recording.
But what about adding the functionality of using the lock-switch to change modes? I mean, normally nobody would use it in such a situation, so would it be possible to write a mod to use it?
For me, it is a nice feature we could use a lot.
Tell me if not, but i´ld really love it if it would be ;-D
I am not yet familiar with coding for Maemo yet, so this is only my Idea.