Irrational exuberance in Internet adland? Facebook made $3.15 billion from ads last year as an “afterthought”

By now you know Facebook filed yesterday to go public.  I learned about it on Twitter.

Shortly thereafter, Digiday Editor-In-Chief Brian Morrissey astutely posted five initial thoughts about Facebook advertising.

He got me thinking:  Facebook sees advertising as, basically, an “afterthought,” and, yet, they did $3.15 billion in advertising last year.

Pity the rest of us [...]