Matt Cutts just blogged about the new Google Toolbar – http://www.mattcutts.com/blog/toolbar-beta-4/

It looks like they arre going to eat the del.icio.us food with new server side bookmarks
Another nice features are suggestions as you type and great ability to add custom buttons with the custom functionality

Link to the Toolbar itself: http://www.google.com/tools/toolbar/T4/index.html

I think the bookmarks can't be shared, as in Delicious...

By the way, I resolved your link (you linked to a full copy of Matt's post, I corrected the link to go to Matt's post).