Design must work reversed out against a dark color as well as on white.
Should include a logo, not just creative typeface.
Color: We tend to like earthtones, dark greenish/gray perhaps, with a contrasting brighter color we can use in related text headlines, site links, etc. However we're open to different ideas, just no excessively bright primary colors.
Style: We're not trying to look Web 2.0-ish. Prefer less shiny. Clean and readable, maybe subdued.
Content: Should incorporate the idea of a duck somehow in it, though it doesn't need to actually show a full duck. Can hint at one, have a stylized aspect of some part (bill, foot, whatever).
Content/random idea, feel free to completely ignore:
--Idea of sketched face of a cartoonish duck, looking dead on, with some hair sticking up. Clean and not too Disney, just something to crack a smile at while talking business.