Excuse me, but I have to object to the derrogatory comment.
I used the apple tutorial as a starting point and was rewarded by finding out what stage the prepackaged ruby and rails implementation was at. And getting a first hand look at using restful structure and seeing that the apple approach in the tutorials was limited by how rails is incorporated into the ide. Given that I was able to make the tutorial work and to show off some capability. It is a worthwhile effort and touches on resources, ajax, associations and scaffolding.
If you are learning rails and want to wade in from the shallow end this is a useful approach. Best of all - its free.
Once the tutorial is finished and running, then its time to examine your ide approach and strike out in a mature direction (unfortunately xcode 3 isn't it).
I've found that when learning rails you can follow all the tutorials and feel like you know something. Take one step outside the tutorial and you learn quickly the water is deep and start drinking from the firehose of at least four different hydrants: namely Ruby, Rails, HTTP, CSS. Add in database knowledge, LDAP, Web design and others. In my case I also run Leopard Server and enjoy the support of Apple's approach with web service integration and rails specifically. I couldn't be happier with the way it works.
HTH,
Harry