According to the court document, available here, his motion largely copies the document filed by Scrushy's attorneys last week.
After a full reading of the motion, these are the main points.
Siegelman's lawyers are accusing the federal prosecutors of blatant misconduct, including the manipulation of testimony from key witness Nick Bailey, improper contact with jurors and failure to disclose key documents to the defense, thus denying Siegelman and Scrushy a fair trial under the Fifth and Sixth Amendments to the U.S. Constitution.
Way more...
http://blog.locustfork.net/2009/06/30/siegelman-files-motion-asking-for-new-trial/
The Locust Fork News-Journal
http://www.locustfork.net/
http://blog.locustfork.net/