I agree with your comment about font size. I actually have a semi-custom stylesheet that I serve via stylebot to get my font size bigger because Hubski is pretty much unusable on a 27" monitor. mk loves his small fonts though. He likes it dense. I gave up that fight ages ago. I do like distinguishing visted links though. We should definitely do that. Also, using cmd/crtl + on your keyboard will increase the size and won't break Hubski (unlike some sites) - just an FYI.
Yeah we need to refactor the css first. It's still css and 5 separate sheets for each theme. It's been added to for 4 years. It's not optimal in any way shape or form. If you feel like having a go, you can pull it from inspect element. That's all we got. ;)
I too think this site could stand to have a slightly bigger font. I have to zoom in to 110% to make the text readable for myself. Might I just say as an aside though, that using the "Office" style for this site on a 15" CRT Monitor makes it look gorgeous.