The Citizens for Responsibility and Ethics in Washington has the story:

Trevor Blackann, 34, a former aide to Bond and Rep. Roy Blunt (R-Mo.), pleaded guilty Thursday to making a false statement on his 2003 tax returns by failing to report thousands of dollars in illegal gifts he received from lobbyists associated with Abramoff. Blackann worked for Bond during the period in which he is accused of accepting illegal gifts.

So far that makes 15 people (including Abramoff) that have been found or plead guilty or are awaiting trial, but the investigation is still going on.