Entrecard is a cool new widget for your blog that allows you to easily network with other bloggers or site owners. The service homepage is www.entrecard.com.Basically what you do is make an electronic business card of your site with your logo and url. You can then leave your own card whenever you see an Entrecard box. By doing that you notify the site owner of your site and also you get one entrecard credit. Whenever someone drops their card to your box, you also get one credit.