Last month two different people wandered in here with the question "What do you call that one swirly pattern with all of the swirly things?" or something like that, and all my blog did was delay their answer. Well never again! For all of you, it's called the Paisley pattern if this is what you're talking about.
It's the pattern of bandannas, cowboy shirts, and old suitcases and its named after Paisley, Scotland even though it is Indian in origin. If you want more info than that, I'll let you continue your google-based research.
While were at it, my current background pattern is known as a Florentine.
PS, eped was right. I liked the paisley pattern way before it was cool.