[zalew]

Tumblr is easy to love as it seems less obliging from the start. It's dashboard is a prime example of KISS, and it's easy to use most of the features as well as not use them at all. I came to Posterous for it's 'autopost' feature which works really fine and I've used it for some time.

Both apps are great, Posterous webservices integration beats Tumblr, but the latter wins in terms of 'hanging around' browsing stuff from the community and that's probably the key point of their success in stats.