I have just started toying with OpenClass, a free LMS (learning management system) from Pearson, which is a Google Apps for Education tool. It's quite capable, yet basic at the same time. It reflects a certain structured class setup, without much obvious room for flexibility. There seems to be some social features like the class wall, but it's difficult to assess how collaborative students will be able to be. It seems like Google Docs are well integrated, which could help, but what about discussion boards, wikis, etc?
Google Reader, an excellent blog/RSS reader is now available as an app on your Android phone. I have recently come back to Google Reader to keep up with blogs, and I highly recommend it. I have some general categories like photography, education, 21cl (21st century learning), but I love being able to put blogs in multiple categories. For instance, I have a category called, "must read."
Screenshots are from the Google Reader blog announcement. Scan the QR code below to instantly get to the download section of the Android app store.