Hi, I’m one of the founders of Posterous.com.

Our goal at Posterous is to make posting rich media dead simple. We actually don’t believe in “pre-defined content types”. That actually makes it harder to post. Why should I have to make a decision about what I want to publish online? Why am I limited to one image, one mp3, one video per post?

With Posterous, you simply email us *anything* and we’ll convert it to the most web friendly format and do the right thing. Multiple photos (which you saw) turn into a gallery, video, audio, documents, all get embedded in flash players.

And supporting email turns out to be great for iPhone users out there. You can email multiple photos from the phone now, video on the 3gs, and audio in the Voice Memos app. It all works perfectly