This was an annoying problem, for me, solved in large part due to the info from this article: http://aspnet.4guysfromrolla.com/articles/070506-1.aspx.

So yes, you CAN modify the default user registration wizard to work with your data requirements.

Left my home office for a minute today, came back and found that my daughter had "helped" me with a membership issue in asp.net ...

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <system.web>
        <authorization>
          <allow roles="user" /> ,, ,mk,mk,m,mm,m,,,,,m,mm,m,m,m mnmkmkj,,,m,kkkk                                       nnmmkj,,mkj ,jkb kjb 
          <deny users="*" />           
        </authorization>
    </system.web>
</configuration>

I didn't test, but don't think this will work too well!

This article (http://apnews.myway.com/article/20090810/D99VV4M80.html) doesn't specify HOW they did it, but it seems that the U.S. Air Force was using Rep. Monitoring techniques to analyze the buzz from the "Air Force One Photo Shoot Scandal".