When designing a logo, it's essential to know the context it's in.
A design reflects personality, character, theme.
The word 'design' is these days misinterpreted. I'm afraid that asking someone to design a logo, without putting the specific need in context will get you nowhere!
I've given about 3 design seminars in the last 2 years, and every time I do I encounter the same thing: People with a computer, photoshop and a colour printer are suddenly designers!
http://www.answers.com/topic/graphic-design
Composition, etc. is key.
Sorry to spout off over this, but I detest the misuse of the word 'design'.