Hi Bonic, I really like the concept in #103 and #102. Definitely a great idea! You might try adding some color to the center ball to give the whole image more excitement. If you look at the top-ranked ones, you'll notice they are very colorful and that's what I think might work in that ball too. Also, the "g" looks a bit like a "q" so please see if you can round it off a bit.
With regard to #100 and #101, I like this concept too. If you and I are thinking the same thing, it looks like you were trying to make the "G" into a volume knob. Is there anything you can do to the "G" to make it look like more of a knob? Adding some dimension or even mimicking a real volume knob would probably look cool. What do you think?
My favorite by far of your collection is the disco ball effect in #144 and #145. Great job!
I also like #146 and #147, but the font looks a little big for the scale of the image. Maybe a different font-treatment (color, 3d, shadow, bevel, etc.) would give it some bang. The lettering below in black is also somewhat hard to read... depending on how dark the background color is.
I'm not a big fan of #140 and #141, as they deviate too much from the original design concept that I liked (#100). The button you use for the "G" doesn't necessarily have to be an exact "G" look and feel. Most volume buttons have a circle (about 98% around) and then a line from the center out. Also, no need to angle the button. I think it would look good pointing straight ahead... just with a little dimension. Also, if you take a look at Bordo's concept (I believe she's in the top 3 right now)... you'll notice one of hers has a "bubbly" web 2.0 effect to the entire logo. Almost like it bubbles out toward you. Do you think you can do that as well for this one?