I was just thinking of this as I was leaving a Comment on The Shadow Slasher.

Does the site tailor to specifically finished copies, or would you say it is for any specific piece of writing.

If the second, I don't want to discourage first drafts and what not, but perhaps a work in progress tag that could be attached to a story to let people know, "hey this isn't finished, care to do some editing for me?"

Or perhaps a section in the forums or in the site itself specifically for works in progress

A feature similar to this was proposed by a user a while back, and I'll definitely consider implementing something like this.

Does anyone have suggestions on how to go about doing this?

Something similiar to Associated Content I would assume.

Buttons:

Discard
Save for later
Preview and Publish

Great suggestion. We were already considering this as a possibility, now we'll definitely have to try using this feature.