I might be wrong, (and I searched a little bit in this forum but perhaps I missed it) but I think the little LED next to the Wifi Antenna is a "status" indicator".
I think the indicator has at least three states:
Unlit: Wifi isn't active (this appears during a reset for example)
Yellow/Orange: Wifi is enabled but not connected to AP (the color is between Yellow and Orange)
Green: Wifi is enabled and connected to AP
Perhaps there are other states (like red) indicating some unrecoverable fault. I have yet to test Wifi connectivity enough in this area.
Just thought that I would share that with the group.
--Doug (dx9s)