I only just recently bumped into Tumblr. Of course I have known about it for some time but there was nothing that really attracted me to it because I saw that everyone's stuff is being mixed up together and I could not see any advantage. That has all changed now! There is something called the "Reblog" and basically is allows you to use someone else's stuff on your page but I see something very wonderful about this and it has to do with the fact that your Tumblr identity is kept in tact. Go and try it yourself by signing up for Tumblr and reblogging other people's content and you will get to understand it much faster than me trying to explain it to you.
There is also something else and it has to do with Tags http://www.tumblr.com/tagged/reblog
Take the above URL as an example. If you make a Tumblr Blog and put some tags into the tag box then it is more than likely that your page will appear in another page. Let say that you want to write about "Reblog" and you include that tag for the tag description of the content it is possible that you will very quickly find your content also included in the above page (I left the link for you)
Why would this be a great advantage? I think people need to spend some time using Tumblr and figure this out for themselves. Tumblr is growing in leaps and bounds and if you are a Blogger then I guess it is something that we should definitely not ignore and check out for ourselves.
Last of all it is absolutely so easy to use. I have never come across a Blog that is so incredibly user friendly. It seems that the folks who are designing Tumblr seem to know what people really want and how to offer it in a way that does not require you to waste time learning the controls. When I compare using my wordpress
vs Tumblr, I believe that it takes me about 1/3 to 1/4 of the time to do something in Tumblr compared to wordpress.