I started this course, run by Dan Russel from Google, in July when it was first offered. I found it to be a really enjoyable course, but missed the assessment timeframe due to another conflict. Thankfully, it was recently offered and I made sure to carve out the time to complete it this time around. It's really a great way to brush up on some search skills (many I learned at the Google Teacher Academy, but discovered a few new one here) for helping educators.
Be sure to check it out when it becomes available again: http://www.powersearchingwithgoogle.com/