Compared to Twitter, Tumblr is still a small dot on the radar, but it's definitely growing fast enough to make an impact. The Tumblr team isn't slacking on the features, either; they recently added the option to add static pages to your blog, as well as dead simple, direct video uploads.
Last but not least, Tumblr plans to launch two revenue generating features next month. Details are scarce (all we know is they'll be powered by the widget, pictured below), but with constant talk of Twitter's revenue generating plans (which are still completely open to interpretation), it'll be interesting to see how Tumblr plans to tackle the issue. Its success (or lack thereof) might pave the way for microblogging networks (although Tumblr arguably stands in the middle, between blogging and microblogging), an area traditionally devoid of revenue.
