Though it probably has a limited market, I really like the idea of a sketchbook specifically designed for paper prototyping iPhone applications. A paper/pen combo is still to this day a developer’s most invaluable tool.

A spot-on article by Wil Shipley on the things that the App Store does right, as well as what it does wrong. Though it’s nearly a year old, much of this stuff still applies.

A nice overview of the excellent automation features in Snow Leopard.

(via Daring Fireball)

Version 3.0 of the Facebook iPhone app has hit the App Store. Leaps and bounds better than version 2.

An exhaustive screenshot tour and overview of Mac OS X over the years.