I don't have an SGS, but I was watching videos on YouTube when I came across this neat hack to hide the antenna. For the cost of a rubber plug (~$2) and instead of spending $70 on the hidden antenna, I thought some of you might find this a viable alternative. I got a kick out of the guy who did the video.
After getting poked in the eye more than once, that was one of the first things I did on my bike. I don't listen to the radio that much, but when I do reception is fine.