"If you've used a Windows Mobile phone device, you've probably seen the little signal strength icon at the top. If you're lucky, you live in a place with good signal strength and see many bars. If you're like me, you live in a cellular dead spot and are happy when you get one bar. On many non-WM phones, the part of the icon that's not bars looks something like an antenna--a vertical line with a triangle on top of it. While you sometimes see this antenna icon on WM Phones, it's often something else. And, what that "something else" is varies from device to device. On some it's a G. On others it's an E. On still others it's two arrows pointing left and right. What are these things? What did they do with our beloved antenna triangle? And why won't they go away?"
The Windows Mobile Team Blog has a nice little post about what the heck all those little icons up on top mean. Questions like, Why don't they go away?" and "Does it cost money when they don't?" are answered. It's short and informative so go give it a read.
 [BlackJack]