I simply love it when a website does what I expect. Take tumblr, the social blogging service. Not only is the site beautifully built, with a variety of templates for every need. Publishing is so easy either from the site itself, or from their iPhone app. But what’s more, in order to get information in a format you can integrate with other sites, all you need to do is add “/rss” after your tumblr address. Why is this good? Read on.