Tutor for Lion is a great compilation of video tutorials. It contains 51 videos which duration is more than 4 hours. The videos are narrated and you see a screencast of what the narrator is talking about. The tutorials range from simple things like what OSX is and what the main differences with Windows are to more complicated and useful things like networking, file sharing, etc.
The first video that you would want to see is "Introduction". In this video, you are shown how to identify your Mac OS X version and the narrator explains what the application is all about. After you have seen the introduction, you can view the videos in the order outlined on the left pane, or jump directly to any topic of your interest. All the videos are sorted into categories to make it easy for you to find what you are looking for. The main categories are Interface and Key Terms, Migrating, Getting Around, Working with Files and Folders, Working with Applications, OSX Lion Applications, Working with System Preferences and Sharing Options.
If you are a new Mac user, you definitely could use the information provided in these tutorials. The application is free for a short time only.
I have been a Mac user for some time, and I still found a lot of useful information in this application. I like that the narrator doesn't take any knowledge for granted and thoroughly explains every feature and its uses.
Mall Creeps
