Google adds 'People Widget' to Gmail

"The people widget surfaces content from friends, family and colleagues that is already available to you but may be hard to find and makes it easier to connect with them," explains Google

From the right-hand column, users will have quick access to a contact's latest emails conversations, shared documents, relevant Buzz posts, and Calendar events.

And if you are annoyed with this new Widget, disabling is easy.. just Go to settings and select  "Hide people widget" then click on Save.

Have fun "Googling"