Found a neat list of the main keyboard functions for several major web services, here. I can appreciate this a lot, being largely dependent on laptop and PDA for my Internet experience; thought I'd pass it on.
I still like the alt-<left arrow> and alt-<right arrow> to move back and forward in web pages without using the arrow buttons in the upper left corner of your web browser.
Correct. That's the one I typically use. The only time I use the alt-<left arrow> is when my hands are already on the alt-<right arrow> keys and I want to go back.