Just to let you know, at the suggestion of thwap, I'm going to be playing around with the colour scheme for the next little bit. Once it seems to have settled down, feel free to leave a comment with your opinion re. the aesthetics and the readability.
UPDATE: Well, that was unexpected. I ended up making more significant changes to the blog's appearance than I had intended, including breaking some stuff that I then had to put some time into fixing. But it's all better now, and I think I like this layout and colour scheme.