Alas, it does not. There are simply no prevailing open standards for mashup building right now that would have made such a task possible.
JackBe is doing leading work with something called EMML (Enterprise Mashup Markup Language) that they created. If that gets good traction, and if they release it to a standards body (as I suspect they will), then we could see vendors and open-source developers rally around it. And that would make it more likely to have code in a future edition or different work.
Right now, the tools for creating mashups (and the resources that go into them) vary too widely. You will see Mashup books that provide Java (or more often JavaScript) code, but these are usually using a few common web resources like Google Maps or Flickr. In Mashup
Patterns, I am more focused on the Enterprise mashup developer whose resources may be largely internal.