Yes you can update your facebook status inside the gmail interface, so you can update facebook status just like you to with google buzz. Another new google chrome addon allows you integrate facebook in gmail just like google buzz. This addon is called Gmail Facebook Integration which will add facebook inside gmail UI.
This addon will also allows you to see your friends’ facebook notifications, some more features are coming soon with this extension in future, so you will be able to do lot more with google chrome extension for facebook
Note: Just like any other facebook application you will need to authorize this addon with your facebook user name and password and once you are done, you good to go and update your facebook status form gmail itself. [ as shown in the image below ]
Gmail Facebook Integration Extension For Google Chrome
[ Source Life Rocks 2.0 ]