Ashley Yakeley
All of these get one thing right that the current and most of the proposed Haskell logos do not: they don't make any reference to the syntax of the language itself. Doing so seems to miss the point of a logo: it's supposed to appeal visually, rather than semantically. So I'd like to see some submissions that don't use lambdas.
All of these, in fact, make absolutely no reference to any part of the language itself, other than the title. Should we then use a portrait of Haskell Curry as the logo? I have no problem with a logo that doesn't have a lambda, but I don't think the fact that using a lambda is (almost) putting syntax in a logo should be considered a problem. An homage to syntax at least gives an easily recognizable icon, far more iconic than a camel or a grid of colours, and I would consider several of the lambda based ideas on the wiki simple, elegant and visually appealing.