I'll second the Hillegass book, followed by the Garfinkel/Mahoney book (a bit dated, unfortunately, followed by cocoadevcentral and looking through all the Apple sample code. Coming from the dark side, it is a bit hard to find your way around at first, but it clicks after a while.
by Richard Albury — Jan 20
I believe Step in Xcode covers Core Data.[/]
s/in/into/