Why I did not notice this earlier is beyond me, however, scaffold_resource is now just scaffold in edge rails. I must have been in a recent change committed.
Scaffold resource used to be the command ( script/generate scaffold_resource modelname) to generate a rest based (restful) scaffold of a model, along with the migration.
A few of my recently bookmarked sites for the Ruby on Rails API and documentation that help with development.
http://www.railsbrain.com/ – Clean easy site for Rails documentation / API info.
Any other suggestions, post a comment and I'll add it to the list.