I just finished Proof-of-Concept blog example. It accessible at http://www.squeaksource.com/SeasideAndSails/ now.
Two words about Sails: it's an add-on to Seaside for fast generation of web application from Domain Model or Relational Model - ready-to use prototype with automatic storing in RDB or/and in OODB. You can read more at Giovanni Corriga's intro, at Sails wiki page or you can look at Sails Tutorial .
This Proof-of-Concept is reincarnation of famous Blog at 15 min video , mutated in "Blog in 5 minute" now. All you need is your Domain Model, described by magritte's describers. Then you just tell #generate to Sails - and your ready and even registered blog appear.