Via xkcd, and you can check for yourself too :)
Posterous vs. Tumblr
I’ve seen a lot of people using Posterous and Tumblr for quite some time, and most of them seem happy enough with the level of customization which is available at both services. I decided to give it a go a few days ago and here’s a short revision of what I’ve been through. I started out with Posterous. It looked great, the standard theme suited me best, there weren’t any...