This is a really great introduction to Couch, and if you like this model of working with data, you can keep exploring as soon as installing Couch. The database has a fantastic admin console that lets you explore your data, create and edit views ad hoc, and try out more advanced couch features. It has a great UI too.
I wrote this originally for an internal brown bag as a gentle introduction for SQL-oriented folks. Glad it helped!
This is very good! I hope it'll be continually supported with new, complex MapReduces as you think of them.