Hi Matt thanks for the help! I'm checking the xcode chapters of your book. The following article by the Redwood guys helped me get passed some problems I was having and I think I successfully surpassed the hello world level. I can now successfully build a macruby project using Xcode 4, so I'm going to stick with it. I'm going to keep working through the examples in your book and forgo the peepcode screencast for now.