Ask HN: Has Google started to advertise their core business?

I've just seen an add on Facebook and I was a bit surprised (ok, socked) to see the google logo. I didn't quite think it was a Google ad but when I clicked it (which I usually don't do) I got to this page: http://www.google.com/landing/instant/#t3&utm_campaign=launch&utm_medium=oa&utm_source=facebook

Does anyone know if Google started any ad campaign in regards to their search services?