There's a lot of great information going on in this thread. Rick, thank you for tagging me earlier. Like Tiffany said, there isn't much I can add. I'm not terribly experienced with dracaena, I just purchased my first one this year. I find it interesting that Tiffany said she was trying a method of nicking the plant because that was something that crossed my mind, too. It's a pity that hasn't yielded any results yet, though.
Aa2 - welcome to ATP!!