As did some of the other participants of the CSLA School 2.0 program, I found Rollyo to be a cumbersome tool, and I much prefer the Google Custom Search Engine tool for my own use.
Google's interface is easy to follow and easy to customize, as is the strength of most Google apps. At the risk of having too much of a "big box store" mentality, I find it convenient to have this one place to go to find various applications. Google does a good job! That's why the name has morphed into a verb in the English language!
Back to the Custom Search Engine--I created one for my upper grade classes. Each year the 5th graders research a state and an historical figure in US History. The 4th graders usually do a project on Native American Texans and other historical figures in Texas History. I included a few sites that I know my teachers like their students to check--the nice thing is that we can go back and add to the list if needed. I will note that I would introduce this custom search engine to students after they had done some research in the authoritative databases that our district pays for! I am a librarian, after all...
This is a great tool though, and one that I knew about, but had no idea how to create! This type of learning is what makes this program sooooo helpful! I will share this with teachers and other librarians in the fall.