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You can easily link to all posts by a specific author by simply adding this PHP code to the WordPress template:

In order to add author page like Evan has, you could have each person create their own page with a page title that corresponds to their username and then contruct the URL automatically by appending the username to a base URL.

Maybe I’m misunderstanding your requirements.
.-= Kosmo @ The Casual Observer´s last blog ..Reflections from a Ledge =-.