I have been tracking a new SQL injection attack that started on May 5,2012. On May 6, the number of sites compromised is around 10. Today, more than 150 websites have been compromised with uhjiku.com injection.
You can find the details about uhjiku.com injection here:
http://www.ehackingnews.com/2012/05/uhjiku-com-injection-nikjju-sql.html
We have reported about this injection to some security vendors, but there is no response from them. I think they will respond to this after mass injection :)
[UPDATE] May 8, a number of compromised increased to 200.