I have to admit, I am a HUGE google fan! I just think it is so user friendly, and it looks pretty too :-) One of my favorite Google aps is Google Earth. It is so cool to think that you can see something as tiny as a house from space! It is a wonderful tool, and has done a tone for geography instruction (not that I do much of that in the 3rd grade). I think Google Scholar will also come in handy during the course of grad school!
To be honest, I dont see a huge need for some of the other tools...but maybe that is because I already have my favorites with those. The calendar just seems like an extra step, especially if you are using outlook already. I also think there are better photo sharing sites. Flickr is great, and I also really enjoy Shutterfly. I like Shutterfly because you can send your pictures to Target to be printed, and you have the flexiblity to add your pics to a cute website. We have one if you would like to see our little one :-))