用户在线时用户的头像会显示一个绿点——这点跟实时聊天工具很像。
Presence will be indicated by a green dot on users' avatars - very much like IM.
如果你更改了个人档案头像或添加了一个好友，迷你更新区域会相应的显示出一条相关信息。
If you change your profile picture or add a friend, the mini-feed will display a message about it.
另一个列子是不太显眼的Flickr头像，Flickr用json输出显示你最新相片，当用户禁用脚本，哪个位置显示的只是一个链接。
Another example is the unbobtrusive Flickr badge that uses the JSON output of Flickr to show your latest photo when JavaScript is available but only a link to them when it is turned off.
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