Gmail is now experimenting with it's personal search results which incorporates emails into search results on the main search. In order for you to have it enabled you must acknowledge and wait a few days for Google to email a response.
I would caution users on doing this unless your comfortable having your emails go public. You just can't tell what information can go public.
Link
I would caution users on doing this unless your comfortable having your emails go public. You just can't tell what information can go public.
Link
