The Wall Street Journal just updated their list of companies that are being looked at by either the SEC or the Justice Department for "options timing" issues.
The table list about 60 companies at present, with a short summary of the issues or recent news stories for each company. It's worth a quick look, as there are quite a few big names on there.
Most companies on the list are being looked at by both the DOJ and the SEC, and I'm sure there are many more to come.