I have a clipped article "How to Fly with Almost Anything." It has a picture of a woman belted in with a cello strapped in next to her. The article is from a AAA World Magazine circa 1993.
Basic tips are:
Call ahead
Contact Your Insurance Agent
Pack the Item Securely
Choose an Uncrowded Flight
Request Special Handling
Board as Early as Possible
Inspect for Damage Before Leaving the Airport
Email me and I'll fax it to you.
Jim