WordPress MU

Ok here's a weird idea that's eating me up and I want to give it a try.

I have a mu installation up and running. I want to facilitate users to write a guest post without asking them to signup. I will provide a input box to enter their content, one more to enter their name and the last one to enter email address. If the user clicks on submit it should get posted as a new blog post showing me as the author.

Very similar to QuickPress without signing in.

How to do this?

You'll probably have to write a plugin - there might be one out there but allowing people to basically use your blog to spam their junk is a very bad idea.

TDO Mini forms plugin. But it won't be instant because of the previously mentioned spam issue.