I've never used Google Docs before, but I just might do it again. I can see it as a way to share documents with my colleagues and have them respond and make changes. I think it's a good way to be able to have multiple people access and edit the document.
As for my classroom, I think that it would be a way for us to consolidate notes - like all students could add to a document. My only concern is what would happen if all these kids had access and some little trouble maker comes in and deletes everything? I would like to have power of veto over the kids editing capabilities.
Looking over the Google Apps, I would use Google Docs and YouTube. I might use the Calendar App if I were more of a long-range planner.
This is two of the four tools I've now thought could actually have some practical application to my classroom. Let's hope this trend continues?
I would REALLY appreciate a Google App that would grade my papers for me...