Well, I have created a searchroll on Rollyo. It seems in some ways Rollyo and Del.icio.us are very similar. Both of them allow me to create a list of websites.
One difference is that on Del.icio.us, when I click on the site I have saved, I can go to it. I tried doing that on Rollyo, but couldn't do it. I noticed that the URL I typed in for some of the sites did not save the entire URL. I know for one of the sites, if someone types in what shows on Rollyo, they will not get to the site I intended.
http://rollyo.com/dashboard.html I called my Searchroll "Things Historical".
At the moment, I prefer to use Del.icio.us.