now we can invite cyber friends
or reality friends to edit and change the content of shared notebook.
http://www.google.com/googlenotebook/newfeatures.html

thanks for the info..
i think its the right time to ask, who really use Google Notebook?

Cool. Well it's actually one of the Google products I use regularly for college research. I never use it for general notes though – all notebooks have a good purpose.

think it needs more improvment for wider use.
for some guy,
much more integrated with othre products
such as picasa, earth, web search, bookmark , calender,
gmail and so on, may make it more useful for people surfing the web
and organize staff online everyday.

I use for collecting notes and research. I use Clipmarks for "sharing" clips.

I second the integration, Mikewarm.