Ever wanted to know why the Bluetooth symbol looks like it does, or what the deal is with the logo on the Command button on Apple keyboards? This link, which tells the story behind the design of many common user interface symbols, has got you covered.
Skeu It! "A celebration of arbitrary and gratuitious user interface decisions." Specifically: needless or inappropriate skeumorphism. Best of Skeu It.
Start Ups: This is how Design works.. A guide for non-designers by designer Wells Riley. [more inside]
Apple historically been at the forefront of UI and HCI research and technology, documenting it in their Macintosh Human Interface Guidelines. In the past couple of years however, they've been slipping. They designed the useless round mouse (that requires a 3rd-party product to become useful), the nightmare quicktime 4 interface, and now aqua for OS X. When I saw it at Macworld, there were lots of little things I didn't think were right about it, and Bruce Tognazzini (or Tog for short) has written a great summary of the UI including problems. So what I'm wondering is, why is Apple abandoning their own guidelines?