After having used the N900 for a few weeks now, I must say that I constantly miss one hardware button, and another one might also be useful. Here are my suggestions:

1) Dashboard/desktop button

When using applications in full screen mode, switching apps or windows is a pain in the ***. For example in the browser:

1. click somewhere on the page to see the "toggle full screen button"
2. tap the toggle full screen button
3. tap upper left corner to get to the dashboard
4. tap another browser window
5. tap the toggle full screen button

That's 5 taps in different parts of the screen. If there was a dedicated "switch to dashboard" button, only 2 actions would be needed; press the button and tap the window you want. All the browser windows could be in full screen mode all the time.

I wonder if it would be possible to get the camera shutter button reprogrammed to open the dashboard instead of the camera app?

2) Phone button

This button could live on the right side of the screen. During normal use, pressing it would open the phone app.

If someone calls you, it could light up as green and pressing it would answer the call.

During a call, it could be red and pressing it would end the call. Right now ending a call is slow if you happen to open another app such as calendar during the call.

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By the way, I'm still using the preprod firmware version from the summit, not the one coming in the sales box.