using the search forums and comments feature you will see that this topic has already been discussed a few times
ddg has already taken off and there are a bunch of us that enjoy both the name and the logo so it doesn't seem that they need help with it
it seems funny to me that "google" - a misspelling of "googol" which is a word that a 9 year old made up - is acceptable (to you) but duckduckgo is found to be childish. for that matter... bing? yahoo? dogpile?
i think that the folks at the product id company in palo alto already understand that a unique name and logo help people to remember the name of the service