We launched Google Reader in 2005 in an effort to make it easy for people to discover and keep tabs on their favorite websites. While the product has a loyal following, over the years usage has declined. So, on July 1, 2013, we will retire Google Reader. Users and developers interested in RSS alternatives can export their data, including their subscriptions, with Google Takeout over the course of the next four months.
PubSubHubbub 中有三種不同身份,可以用不同的伺服器跑。一個是內容提供者 (Publisher),一個是訂閱者 (Subscriber),另外一個是 Hub。內容提供者在這邊的例子就是 (Micro/) Blog Platform,而訂閱者可以是 Google Reader,Hub 則是中繼角色,目前有 Google 提供的服務可以用,也有 open source 軟體可以自己架。