Exactly as happened with Google Reader, two years ago, during a "spring cleaning", Google killed its Notebook.
Also in that occasion it was a shock for me: I wrote hundreds of notes on it and I got addicted on it. Find, suddenly, all my notes "imported" in a single, huge, useless word file made me very angry!
Then I found Springpad and I got my replacement...
Guess what? Now they are pushing it again, but with a different name!
Yay! That's great!
Well, I can't trust them anymore, maybe I get used to it and use it daily to jot my notes and then, BOOM, it gets wiped again during a "spring cleaning" 