The new Wordpress plug-in called GooseGrade
allows one to do that. Is there an end to this seemingly
all-encompassing interactivity and collaboration? If you have ever
blogged, or are blogging now, would you like your users to be able to
correct your mistakes? As someone who has occasionally let a typo creep into a blog post or two, I'd be humbled by this possibility, but I am not sure i like it. Good thing is, seems like you have a choice to review the corrections before they get posted.