Annoying co-irker

The guy in the next cube whistles, sings, hums, drums his fingers and loudly talks on the phone trying to get a homeowners loan. While several people have complained about this his behavior, it only improves for two or three days before a relapse. We’ve all started listening to MP3 players with varying degrees of success, but our individual sanity is slowly slipping away.

Short of homicide, although we’re hoping one of us cracks soon and decides it’s “Bring your AK-47 to work day,” does anyone have any suggestions or similar experiences?