I think that this tool could be pretty useful in my classroom. I like the idea that we can share a document with MULTIPLE email addresses without emailing with attachments. Having a working document up online, and having the ability to make it available to the public or only to certain people is great. We could maybe use this for a classroom newsletter, or maybe even our school newsletter? Grade levels could submit their "piece" for the month without emailing the attachment to Pauline, we could just write it right there! This tool also makes students' work available for classmates to read and comment on which is really cool! This tool makes it very easy to collaborate!
The Google Reader is pretty interesting. I love being able to select sites/blogs that I am interested in and getting updates without going to search for them.