I'm working on, planning really, making a website. I basically need an open blog format. Someplace where anyone can post their own blog in real time.

This is the best example that I can find : http://iranian.com/main/blogs

I want to have a page that has blogs, with photos or video, from users that are registered to my site.

I know that this is all a bit vague, I am very new to this.

I need something free and relatively easy to use. Hopefully something that I can get ad revenue from at a later date.

I hope that I don't sound too stupid here.........

A please and thank you in advance for any help with this.