Chapter 4 - things I missed the first time around

When I first read Agile Web Development with Rails (AWDWR), I skimmed over link_to. That's hard to believe now, but I can clearly recall coming to some Rails code and wrestling with link_to. Additionally, ERB was a bit of mystery, too.

I strongly encourage those new to Rails to slow down in Chapter 4 and actually do the experiments at the end of the chapter.

Even though ERB is tried-and-true, some HAML, Markdown, Redcloth coverage would be useful in a third edition, at least as a footnote. It's probably worthwhile to add a chapter in the book to the topic, rather than overwhelm the reader during the first demo application, though.