New in Google Labs is an add-on for having embedded web search in your email space- this means while composing a message, there is right in the mail interface a search form. The results appear in a GChat pop-up/overlay, and the results can be directly inserted into your message.
In this case, I am emailing my friend Cole a message, and need a URL for a site to share– I can search+find+insert all in the email composing window.
So this saves having to tab over to another window, run a search, copy/paste the URL (especially since the one in Google Search results does not point to the actual URL, but a Google ByPassSnagSomeINfo URL).
The post "GSearch in GMail is GGreat" was originally zapped with 10,000 volts and declared "It's ALIVE" by Dr. Frankenstein at CogDogBlog (http://cogdogblog.com/2009/05/gsearch-gmail/) on May 8, 2009.