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Google is rolling out a new tool to go with its Google Instant search called Instant Previews. With Instant Preview, a magnifying glass icon will appear during an Instant search that will allow you to preview the page without losing your original search results. Sam Diaz has more on Google's new gadget.
While doing a search for Instant Google (backwards) nothing of interest comes up with "Insta".
Screenshots: Google. Here's the tool.
But with "Instan" you get the Google Instant site. Note the Instant Preview icons (circled).