del.ico.us

I could see how this would be rather useful if you are doing a lot of research, or if you have tons and tons of websites that you frequent, while using a computer other than your own, but I do not fall into either category, and thus cannot see that it would be a terribly useful thing to me. The websites that I go to on a daily basis are few, and I have the addresses memorized. It's definitely a good tool, just not for me.