I wonder if the black background on their book's icon at the bottom is supposed to be there or not.  Since it's a PNG and everything else has a transparent background I am guessing it is a mistake.  Silly little detail..I know...but I am a designer so this stuff jumps out at me.  I can't wait to read the book though.<p><a href="http://37signals.com/images/icon-crumple.png" rel="nofollow">http://37signals.com/images/icon-crumple.png</a>