For those that don't know,
Google Suggest will suggest keywords as you type, based largely on the popularity of other searches. So as you type "Apricot" it suggests "stuffing", "seeds", "brandy", etc.
The interesting bit is that if you type "professional", guess what comes at the top of list of suggestions? "pilots rumour network". I was amazed (though pleased of course) that PPRuNe is the most searched for "professional" thing on google.