If you have ever thought, "I wish I could add a bunch of parameters (shared too) to a family all at once" then you may want to take a closer look at this.
In the Software Developer Kit (SDK) for 2010 they've added a few new samples. One is called "AutoParameter". Here is a description that I found on Jeremy Tammik's prolific programming blog. If you read his post you'll have to scroll quite a bit because it is toward the end of the post.
AutoParameter implements batch mode automatic addition of shared or non-shared parameters to one or more family documents. It optionally processes either the currently active family document or all families in a specified folder. It uses the FamilyManager class AddParameter methods and reads its input data from parameter text files in a format similar to the Revit shared parameter files.
You may want to use this one as an excuse to get more familiar with the API and the SDK.