There's a nutrition database available from US gov, can't find the link at the moment but it's out there. There are many SEO sites based on this. It would be nice if there were some zero click info on nutrition, in particular you can make a label and convert to metric or standard portion sizes.
Thumbnails for comic strips
Very often I search for a comic strip I've already seen to send the url to a friend. It would be nice to have thumbnails for comic strips so you can tell the precise one instead of having to click and back over several links. For example the other day I was searching for XKCD's http://xkcd.com/743/
and had to click a few times. Note I don't mean ripping the full sized readable strip but giving a reduced thumbnail like Google Images does.
Compiler and CPU instructions
It would be nice to have zero click info on instructions and functions from pages on Microsoft, Intel, etc. Those pages are a real pain to search because usually forum pages or articles pop up above the manuals. Also this info is usually available on downloadable PDF. My friends working on electronics complain all the time about this problem, too.
There's a lot of Creative Commons fan base information on sites like Wikia for zero click.
Parts and models
For some strange reason many big manufacturers have terrible search engines and chaotic ever-changing websites. This happens with things like notebook models to hard drives. It would be nice to have some sort of !toshiba <part> or !dell <part> and have the right results.
Thanks again, I'm loving DDG more and more by the hour! :)