The committee is required by law each January to issue a summary of its activities from the previous year. The panel's report for 2009 says it conducted a "preliminary inquiry" of 13 different alleged ethics violations (eight of which carried over from 2008). Of those 13, eight were dismissed for various reasons and one -- the investigation of Sen. Roland Burris (D-Ill.) -- resulted in a letter of admonition.
That leaves a total of four investigations that were active as of the beginning of January. The committee does not publicize whom it is investigating, so the identities of those facing scrutiny are not all clear.