Gary Price over at Search Engine Watch pointed this new engine out today. The engine is still in beta, and is getting its listings through a partnership with Google.
The add-ons seem to be the interesting elements that could make them popular. They have a personal "blacklist", a link to the archive.org (The WayBack Machine), Whois information, dictionary definitions and other additional features.
According the article Mozbot is looking to expand to the UK and US.