Our email addresses:

Solutions to exercises: We have solutions to some of the text exercises, which we are happy to provide to instructors. Please email us. We will be adding more solutions in due course, but we encourage anyone using the text to get in touch with us if they have questions about particular exercises.
Lecture slides: We have some lecture slides developed for teaching a course using the text. We are happy to provide these to instructors, but they would have to be used with some care, as they were prepared with a particular cohort in mind, and would not be suitable for students at all levels.
R programs and datasets: Longer R programs and all datasets used in the book can be found in the spuRs package for R (details of how to get this are given in Section 1.6 of the book). These are also available in this gzip archive or this zip archive.
Errata: Please email us if you find any typographical or other errors. Errata (at October 2011).