Agreed; but with an availability date of 2011-06-20 we should see something soon.

The book's page has just been updated with a few excerpts: http://pragprog.com/titles/tbcoffee/coffeescript

Criticisms welcome. We're aware of some technical issues (most notably, there's no syntax highlighting for the CoffeeScript snippets), which will be fixed shortly.

Just bought the combo - looking forward to going through the beta! Thanks!