Add an "Extended Author Bio" to be displayed instead of the User Descriptions in multi-author-blog's Author Profiles.
This plugin adds to Profile Pages an extended "Author Bio". This allows users to add more information to what they'd feel comfortable adding underneath the post. This Author Bio can be displayed on the author page, as opposed to the standard "Author Description".
This plugin is a framework, so requires a bit of PHP skill and experience in template editing to make it work.