Congressman Etheridge only accepts email from his constituents. So go to his website (http://etheridge.house.gov/Contact/), and use his own address to send him some kind words:
Outraged Citizen
333 Fayetteville Street, Suite 505
Raleigh, NC 27601-1742.

You can also request him for an appearance - I submitted the address of the North Carolina Attorney General's office:
Attorney General’s Office
9001 Mail Service Center
Raleigh, NC 27699-9001
Telephone: (919) 716-6400
Fax: (919) 716-6750