Search engines with graphic snapshots: PageBull and Snap

Recently I read about this snap.com and pagebull.com.
Both this two search engines show a preview of the page returned by the search, a graphinc one. A sort of snapshot.

This is interesting; sure they will not become my main search engine, but I'm sure that I'll use them quite often. I work in the web development field, and having a fast way to compare different sites, or to have a fast look at competitive sites could be a quite good resource.

pagebull has less "textual" information and fills the entire browser window with snapshots; snap is more "traditional" and shows a links list (with textual info) on the left, and a single graphical preview (related to the focused result) on the right.

http://www.snap.com
http://www.pagebull.com