I have two ideas, but am open to others:
1) I imagine a boy in a newsboy cap--drawn in an "Astroboy-like" or Tokidoki'ish style with a dash of 1950's, but not too cutesy, holding a megaphone up with "Givox" or "G" on it and talking through it--like leading a cheer. The logo should convey a fun and whimsical spirit, but with a clean, modern and warm feel.
2) Play off the meaning behind the name, and create a logotype based off "Give" and "Vox" combined to yield Givox. Just as an example, maybe do a simple logo text with capitalized G and V...I'm open, but would like something more simple on this one, like Fab, Gilt, Sevenly, or Style Mint. I like sans serif fonts more, but a serif font with a younger look is also fine. Feel free to forego the capitalized "G" and/or "V" if it's not working.
Here's a site of the color palette I am using for the site:
http://kuler.adobe.com/#themeID/2044110. If you think the colors grey and yellow are not working, then you can try some others--maybe from the kuler palette.