I've commented on both Arduino and Science Journal on this blog. Now they're the same. Google has transferred Science Journal to Arduino, so, if you use Science Journal, it's time to upgrade.
I'm expecting good things in the future. Although Google has had a strong focus on education, it's sorta spread out and I've felt that the Journal hasn't grown nearly as much as it could. Arduino expresses a commitment to Science Journal and Arduino boards as an ongoing tool for learning. Hopefully we'll see exciting change in the future.