Ole Begemann with a look beyond the basics of gesture recognisers into making them feel natural and behave as the user expects. Ole's blog really is a superb resource and if you don't subscribe directly or follow him on Twitter then you really should.
If you are using Core Data but don't use mogenerator then you will want to take a look at this getting startedguide out from John Blanco.
More Core Data goodness from Keith Harrison on using expressions with your Core Data queries.
I liked this look at an "infinite" drill down using iOS 5 storyboards by Jason Lust.