One of Google's bigger announcements at its search-focused event earlier this week was the integration of personal Gmail content into Google Search — users will soon have the option to see Gmail results integrated right alongside other search results. The feature isn't publicly available yet, but Google began accepting sign-ups for a limited field trial along with the announcement, and now some Gmail members are receiving notifications that the feature has been activated for their account. Several tipster have written in to let us know that Gmail has begun popping up in their searches after receiving an email notification saying the feature was turned on; we've been able to confirm that with a few personal email accounts, as well.
It works just as Google explained a few days ago — search results from Gmail show up in the upper right of the screen, above Google Knowledge Graph content. They're hidden from view by default, but you can click to quickly see a snapshot of your Gmail conversations relevant to the search term. Upon clicking a conversation, it brings up a dedicated view of the whole relevant email thread rather than simply moving the user into Gmail, but there's an option to click and view the messages in the native Gmail interface as well. Strangely enough, this feature doesn't appear to be supported in Safari right now, though it works fine with Chrome and Firefox. If you want to participate in the trial, you can sign up right here.