Tumblr just keeps growing and growing. It is a micro-blogging platform of choice for millions of active internet users who find that tweeting and updating on facebook aren’t quite enough. With Tumblr, recently purchased by Yahoo for $1.1bn, you create a Tumblelog for yourself. Navigating the user-friendly dashboard is easy with a number of big, graphical icons to choose from. From there you can create new posts which may include text, photos, links, famous quotes,…