I got an email about an online petition going around to save Google Notebook.
If you're interested, the link is right here: http://www.petitiononline.com/gnoteb/petition.html
I'd love to see it work, however there's nothing (unfortunately) that would lead me to believe that if Google had a petition signed by 10,000 or 50,000 people that they would change their mind. Maybe they would? It's certainly worth a try.
I believe a more compelling argument is forming on the Google Notebook Blog comments section (428 messages as of right now ... here). There is a high level of anger, disappointment, and distrust that has been created by discontinuing development of Notebook. This upset is certainly justifiable given their actions .... AND equally important, their lack of a clear explanation behind this action ... AND their apparent inability to provide a suitable alternative (Docs? Wiki? c'mon). The free market will respond.