Bitt, are you going to make the larger font version of the default theme? I can make the changes if you post the relevant CSS files for this theme or let me know how to download them.

Do you know if the font sizes are all specified per element in an absolute measure like pixels, or is there one base font and are the rest specified in relative terms like ems?

I can also take a shot at the post quote though someone will likely beat me to it. I'd probably start off by looking at specifying the size as a percentage of the containing element. Or set it with margins so it otherwise takes up 100% of the containing element (minus the visual space caused by the margins).

I'll go back to the other thread in case it's already been mentioned where to get the files.