Two fun links
(For some definition of fun, anyway.)
First, a Mac OS X application called Clutter, which downloads album-cover images from Amazon for the albums you have in iTunes; you can then double-click an album cover and iTunes will play the album. I haven't tried it, but it looks interesting.
Second, an entertaining new (about a week and a half old, in fact) programming language called Whitespace, in which all of the commands consist entirely of the characters space, tab, and newline. From the front page:
Some things which are difficult in other languages are made much easier in Whitespace. For example, literate programming is simply a matter of writing your helpful comments in between program instructions. It's also easy to encrypt your programs. Simply write a misleading comment!
Both links courtesy of Celsius1414, which I just stumbled across while looking for something else.