In reply to Unai.

I just dig a bit on the forums and I found this comment made by Calum (UM):

"Front-end post editor is also planned for future and will have lots of controls over who can post, which roles are pending posts etc."

Doesn't say if it's gonna be an extension or (hopefully) part of the core, though.

I'd like to take this opportunity to say that, when I say the front-end post editor (and also the following system) should be part of the core, it's not because I don't want to pay for that. I want to give this guys as much as I can to support them. But I think those features should genuinely be part of the core. Not everyone as the same resources, and for someone in a least developed country, and extension can be an expensive obstacle. But if you have all the tools to kick-start your community it's easier to get some money back to invest in extensions to improve your site; like social login, which I think is a perfect example of what extensions are for in this kind of business model.

That's my two cents.