ObjColumnist.com is the personal blog of Spencer MacDonald, who spends his day (and most of the night) programming in Cocoa/CocoaTouch. He is currently delving deep into the innards of the iPhone SDK, after developing Mac OS X applications using CoreData, CalCalendarStore and PubSub frameworks.

(Note: PubSub is not a euthamism for  buying a foot long sub, after a heavy session down the Pub).

You can follow him on Twitter