Sven Haiges is at it again.  This time, he's created a screencast in which he builds a simple Grails application from scratch in less time than it takes to brew a cup o' Joe. Sven, who's also the voice behind the weekly Grails podcast, hopes to add more screencasts in the coming weeks.  This first screencast is an excellent showcase of the productivity one can have with Grails, and it's just the kind of marketing that Groovy and Grails need.  One of the key factors in the success of Ruby on Rails is, without a doubt, the marketing genius of David Heinemeier Hansson.  (That's not to say that Rails is anything short of revolutionary, but even a great product needs good marketing if it's to have any chance of significant adoption.)  It's great to see Grails begin to develop some similar collateral.