It would be nice if I could search in multiple specific sites for a given search term. For example, if I want to search for video editing software, a general search gives me results from a lot of sites that I don't trust. If I want to search for this term only on, say lifehacker and downloadsquad, then it should be possible to search using something like "!lifehacker !downloadsquad video editing software" (or using some other format). This would be a feature that I would use very often. Right now, I have to search these sites individually.