yahoo's response:
Hello,
Thank you for writing to Yahoo! Search.
The re-review process takes several weeks to complete. At this time, we
cannot give you specific details why your site has been penalized.
Please check
http://search.yahoo.com to see if your site has been
included in the index. You will not be receiving further notification
from Yahoo!.
Thank you again for contacting Yahoo! Customer Care.
Regards,
Dustin
Yahoo! Customer Care
25670106