Nice. I love the screenshot capability and the FireFox extension but I won't be using it until it develops critical mass like del.icio.us has!

From historyAgent:

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History Agent is a poweruser's tool to rapidly log, catalog and search websites from any computer, anywhere. There is nothing to install for basic usage and no fee. Additionally history agent provides XML, OPML, Atom, RSS and javascript feeds for recent history and bookmark folders as a service for bloggers and website owners.

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