Does it look like Diablo, OS2009, or any firmware update will actually make the sound through headphones much louder on the N810?

Don't get me wrong, I love having speakers to hear, when I don't care to or don't have to use headphones, but in some places you just gotta use headphones.

For example on public buses where people talk loudly a times + the sound of the bus or if you are in a bus terminal with loud buses around, you can hardly make out the audio of the N810.

I was listening to the N810 on the bus one day and I could hardly hear anything and I had to listen closely to figure out what they were saying.

I have heard people say they have no problems with their N800 and the headphones though.