Check out the new Entrecard, a new creation by Graham Langdon, the creator of MillionDollarWiki. It’s basically a virtual business card for bloggers to easily trade contacts and also earn advertising credits.

Think of Entrecard as your business card 2.0. You create a digital business card, which can be anything you want (your logo, a cool image, anything), and you swap cards through a widget you place on your blog. So any of you readers out there could leave me your “Entrecards” and I could check out your sites from my Entrecard inbox, which is where your card goes when you leave it for me.

The cool thing about Entrecard is it can buy you advertising for free. See my Entrecard on the top right of my blog? You can buy that space for YOUR entrecard, using credits that you get for free every time you give and receive a card.

So, Entrecard is valuable to all you on two fronts. First, there are the networking advantages. Entrecard is an easy-going and comfortable way you can introduce yourself to fellow bloggers, simply by leaving your card. And because its only open to owners of blogs, the cards you receive are going to be from your most important readers, your most influential readers, your readers with a blog and audience of their own!

And then there are the free advertising benefits when you buy and sell ad space in Entrecard credits.

Finally, Entrecard can make you money, when you earn credits, those credits are good to buy real ad space on any blog in the network. So, you can sell them on eBay or Craigslist, or however you like.