[mjv]

I evaluated both of these platforms without really thinking that either were competing with each other (although, I guess it's obvious). I found that, yes, Tumblr is huge, more user friendly and community driven, but it's also over-run with 13 year olds posting Twilight pictures, whereas Posterous just felt a little more focused on the single user blogging experience. A lot less clique-influenced. I liked that. It's disheartening to know they're going for the same things Tumblr is.

[robryan]

That is something I've found, it is possible that the posterous user base can be more easily monetised than the tumblr mainly because on average they actually have money too spend. They both seem to lack a real revenue model currently.