Dataset suggestion sought

[Frank E Harrell Jr <f.harrell@vanderbilt.edu>]

Dear Group:

In revising my book Regression Modeling Strategies for a second edition, 
I am seeking a dataset for exemplifying multiple regression using least 
squares.  Ideally the dataset would have 5-40 variables and 40-10000 
independent observations, and would generate significant interest for a 
wide variety of readers.  For example, the topic could be political 
science, society, human suffering, sports, psychology, economics, 
entertainment, history, etc.  The dataset needs to be publicly available.
I would appreciate your suggestions.

Thanks,
Frank Harrell
Vanderbilt University
Nashville TN USA