Seattle-based Shelfari, the online book focused social networking site backed by Amazon.com and Curious Office Partners, has rolled out an update to the firm's web site. Shelfari launched the changes on Monday, adding new navigation features, ways to find books people find are popular, and ways to get more information about author. The center of the updates was the addition of "My Shelfari," a navigation feature that directs users to their profile, bookshelf, friends, and groups, along with an overall update to the firm's CSS templates.