sairose, I was just initiated into SAI last friday and got to wear my guiding star's pin (our pins haven't come in yet!)
Here's a picture I found of the Sigma Alpha Iota (women's music fraternity) badge:
It's kinda small, and is drawing, not an actual photograph, but you can see the pan pipes, surrounded by the greek letters Sigma Alpha Iota and pearls.
I think the SAI badge is really pretty, and the Kappa Alpha Theta badge as well, of course. As for GLO's I'm not in, I really like the Pi Phi arrow badge, very unique!
Sarah