As I promised at ESUG 2010, I created a page to keep Reef information and documentation... 

You can see it here: http://www.smallworks.com.ar/en/community/Reef

Also, I began to write a tutorial for Reef, the first part is here: http://www.smallworks.com.ar/en/community/Reef/reefSimpleTutorialPart1

And the slides for the presentation is here: http://www.slideshare.net/EstebanLM/reef-esug-2010

Cheers,

Esteban