After extensively researching Scratch my partner Kendall Hill (blog site: Scratcher2) and I found that we were extremely dissatisfied with Scratch. We found it to be time consuming, complex and to try to implement such a complex programming tool into the classroom would be a nightmare!
The only benefits we found with Scratch was the ability to download other people's animations (this includes an extensive range of classroom suitable games and tools) and the potential to use it as a 'reward' in the classroom.
Overall we were really disappointed with Scratch. We started off so enthusiastic about the program but slowly became frustrated with the complexity and lack of explicit instruction and support for the program. That said, those who enjoy programming will most definitely fall in love with this program!