Ah, the great "Soda-Pop-Coke" debate! From what I've always been told, it's a regionality issue. What you call it more or less depends on where you're from. Here's a terrific map that was done a couple years ago:
http://strangemaps.files.wordpress.c...pvssodamap.gif
Sorry I couldn't post it here, it needs to be viewed full-screen to read the details.
Great thread, Gentleman. Thanks for allowing me in!