The biggest thing you will notice missing in Fedora 11 are non-free applications and codecs. They are not 'missing' per-se but left out purposely. Fedora operates on a fairly strict guideline of using 'open' or 'free' software and adhering to this philosophy means certain non-free components must be left out of the Fedora 11 default install.
If you are like me there are several non-free components that you must have to make your system meet your needs, and I will explain how to do this in a moment. First, I would like to remind my readers that our long term goal, as Linux enthusiasts, should be to find 'open' or 'free' alternatives to these non-free components. We are not there yet, but in time I hope we will be able to meet all our needs using only Open Source components. Now I will climb off my soapbox and explain how to enable both the free and non-free RPM Fusion repositories. The RPM Fusion repositories are solid and will enable you to access most proprietary multimedia content.
To enable the RPM Fusion repositories simply visit the RPM Fusion Configuration page and follow the directions. Once you have completed this procedure anytime you encounter a multimedia file that requires a non-free component you will be given the option to let Fedora install it for you. Pretty straightforward!