Google is a curious company. First their internet search engine took off like wild fire. Yet I don't remember seeing any Google ads. In fact I don't even remember thinking "How odd, nobody's seen any Google ads" until it was pointed out by Paul Graham's article What the Bubble Got Right.
Then during the past 24 hours, I was bombarded with praises of Google Desktop:
Cedric Beust: Google Desktop Search radically changed the way I search on my computer. Check it out!
Kevin Heifner: Way cool!
It just happened. There were no preannouncements a year ago. We don't know what the codename for the project was while they were working on it. I didn't hear them talking about metadata, indexing techniques.