[Plugin Unknown] Any iWriter or TextBroker Clone, or Similar in Functionality?

Considering the huge list of plugins available, i was wondering if anyone here has ever stumbled upon a plugin that’s essentially an iWriter or TetBroker clone.

I have searched for “project management” plugins and they kind of come close (such as TaskFreak and CollabPress), but none of these allow a task to be “open” for anyone to grab or claim freely (more details on this below).

Ideal Highlights:

– Front-end interface

– Allow client to post an article/project request (project title, description, deadline, how much he’s paying for it, etc)

– Any writer can see the project available for the taking, and he can claim/unclaim it for himself (first-come, first serve basis).

– Claimed article disappears from the queue immediately, or becomes unavailable immediately so nobody else can claim it.

– Writer can only claim one article at a time

– When the writer submits it for review, then it goes to the client’s queue for him to review

– He can communicate with the writer, asking for changes if necessary (writer/client receive email notifications upon project status updates)

– He can ultimately approve or reject the article.

Anyway, just wondering if anyone has ever stumbled into something like this, that closely matches iwriter or textbroker. Thanks!