I'm working on a magazine that has two areas: a professional writer driven portion and a user submitted portion. We want the user submitted portion to be able to be formatted like the professional articles (including embedding videos and either uploading or easily linking to photos), but we don't want to give folks back end access for security purposes. We had tested out UCan Post, but it has a lot of security issues and after we added Bulletproof Security, it's upload feature ceased to work altogether. We tried out Post from Site, but it's extremely limited and buggy when it comes to categories.
Essentially, the main thing we want to find is a plugin that will allow base level subscribers to post articles from the front end (without waiting on admin approval) and include: An easy way to upload pictures or embed photos/videos from sites like YouTube or Flickr Categorization Basic Formatting Support of custom post types
To see what we've got so far, go to: http://www.darkestgoth.com/wp/communitygoth/submit/