Has anyone tried to invert the LCD so that it is more readable in the dark? If so, how successful was it?

I'm sure it could be inverted with a kernel hack pretty easily.

Although I don't think that would improve readability... About the only thing that improves readability on that thing is jamming your face directly up against the LCD...

I wasn't referring to any software hack.

I was thinking something more like this hardware hack.

Here's a diagram of how to place the polarization film and a close-up shot so you can see how it looks in greater detail.

Cool.