I think your user interface is great, but you could probably figure out a better brand.
I used Duck Duck Go for a month or so earlier this year. I liked it and thought it was awesome for general queries like movie or person names but pretty bad for text searches, like error messages. For this reason, I returned to Google. I also thought there were way too many "Search on these sites..." icons for that to be useful in any way; if Google was easily searched from there with just a click, I may not have changed back.
Most people don't like the name "Duck Duck Go", and it's too long, I think. Guy should rebrand it into something similar but under two syllables.
In this case, they've made their verb obvious: Duck It. Pretty easy, no?
"Bing" has similar issues - is the past tense "bang"? "I bang her on the Internet"?
Not that this is much of an improvement.
</disillusionment>
But "Duck it"? Somehow the name feels a little off to me.
I can see the idea of a duck diving down to retrieve a tasty bit of food (weed!).
How about "pekin", it's the name of a duck and suggest "peek in" to me. Sadly pekin.com is squatted but then what isn't. It's slightly awkward for "pekin it". Or "scoter", another duck; sounds like "spotter" and could be used as "scot it" which also sounds like "[he]'s got it".
Not really there but, some thoughts anyhoo.