12.

Although I can see why a service like this is appealing, it was really difficult to come up with something useful that I would want to rollyo. I decided to try knitting, because I would rather be searching from sites that have patterns that I like, rather than old fashioned stuff that happens to be free. But, I would rather use it for the library. I think that it's a great reference tool! You chould put all your adult reference sites in one spot, so you can be sure that you are searching documented sources. I think that this tool is best used in conjunction with delicious. I could serach by tag and create a different roll for each tag. As long as I was tagging correctly, I think it would be really useful. Here's something cool I found while looking for knitting stuff: