AskTog has a new column first one in over a year
Apple's Flatland Aesthetic, Part1: The Mac is pretty good. It covers a lot of the difficulty I have with Apple's OSX and iPhone. Actually his second article this year, I missed the first as I only check his site every few months.
Tog doesn't publish very often but his articles are usually very good. For usability guidance I also like to read Jacob Nielsen's Alertbox articles.