Matt Gemmell is a Scottish software engineer who's now writing about himself in the third person. After having worked for Adobe Systems for a few years as Product Manager for GoLive Extensibility, he started his own little software company: Instinctive Code, which you can find at http://instinctivecode.com/ . If you need a Mac OS X Cocoa or iPhone app, get in touch.
Matt discovered Cocoa and Objective-C in OS X DP4, but only really started seriously using ProjectBuilder etc after getting hold of OS X 10.0 (early in the morning on March 24th, of course). Since then, Matt has been a full-time Cocoa developer, and has contributed several apps (including the slightly famous iCal Birthday Shifter) and plenty of source-code to the Cocoa community. See his Cocoa Source Code page ( http://mattgemmell.com/source/ ) for all that stuff.
For a further disturbing glimpse into Matt's mind, check out his blog at http://mattgemmell.com/