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This plugin lets you show a different greeting message to your new visitors depending on their referrer url. For example, when a Digg user clicks through from Digg, they will see a message reminding them to digg your post if they like it. Another example, when a visitor clicks through from Twitter, they will see a message suggesting them to twit the post and follow you on Twitter. You can also set a default greeting message for new visitors (not matching any referrer URLs) suggesting them to subscribe to your RSS feed. Professional bloggers know that having these targeted suggestions on their blog increases their blog exposure and loyal readership. Best of all, this plugin is compatible with various WordPress cache plugins so you do not have to sacrifice speed.  Even Smashing Magazine is using this plugin.  Take it from the pros and download it!