I installed Google Notebook yesterday. It will probably take the place of my usual habit of copying clippings from websites into a Microsoft Word document. It seems faster and it stores a copy of your information on the net so it can be read from other locations. Google is making it very easy to share information on the net and colaborate as well.
Their spreadsheet is very similiar to Excel. It is free and allows the writer to specify by email address who can view or alter the page. I haven't used Writely, their word processing program, but I will when I need to share information with someone else on the net.