I tried to start a thread on this subject about two weeks ago. With no responses, I assumed I was the only one interested in keyboard navigation. I'm very happy to know that there are two of us!

The only answer I've found is to use the Links2 browser, either in text or graphics mode. It's available through Easy Debian. In text mode its usefulness is limited, but sometimes very handy when I'm on a low-bandwidth wireless network or Edge. Even in graphics mode it does not work with many sites. But when it does work, it's great to be able to browse with just the arrow keys, not having to worry about about hitting an impossibly tiny target,

If there are any followups to this, they should probably go to the earlier thread, where they might be somewhat on-topic:

N900 Browser: navigate links with arrow keys?