Require a Professional Logo

Basically the logo is for a facebook app/website called RewardsWorld. It's a rewards site for users to signup, do surveys/trials/etc. to earn points, and then cash out for prizes. I'm sure you've seen them before. What I need is a simple yet professional looking logo. It needs to be 760x100 (If need be you can make it just on the left side and then blank white space the rest of the image, but must be that file size). I also need the logo integrated into a square format so I can scale it down to a facebook icon. As for color scheme etc., I'm not sure...I'm not artistic at all. The only idea I had was that the 's' in Rewards would be a dollar sign and the 'o' in World would be a planet/earth. Not sure how well that would look though. Please let me know any bids and ideas you have. Thanks!