I previously talked about Smashing Magazine about Facebook page. They also released a very interesting guide about Tumblr. You might already know Tumblr as kind of fancy / trendy / cool place to share pictures, links, porfolio.
According to me tumblr is more a niche microblogging service, challenged by Posterous and focusing on the design aspects and the simplicity of the interface. Yet, this is a very dynamic niche – almost all the artists / designers / creative people I know have a tumblr they play with, and Tumblr has become a big player in the creation of Internet memes.
That’s why the guide of Smashing Magazine might interest you. Should you have a Tumblr account, your feedback is welcome. And if you have a Posterous account, it’ll be very cool to hear your opinion about a challenger 🙂