Would You like to integrate --- facebook in gmail --- i.e. use facebook via Gmail.

then go to,

settings >> labs >> (enable) Gadget (i guess this lab feature is at the bottom) >>

when enabled and saved, Gmail will automatically reload page...

then again, goto settings >> Gadgets (it has now appeared because you've enabled Gadgets)

then use this, Gadgets made by ibuno.net

http://hosting.gmodules.com/ig/gadgets/file/104971404861070329537/facebook.xml

Now use Facebook in your gmail. Click on expand [written on the gadget at the top] it will open nicely just like Buzz. But not better than Buzz after all buzz is Google's original feature.

Buzz will be a success --- it's just that Gmail needs to keep up their quality service and improve their speed in order to challenge this concept of putting a social networking feature in a well established highly specialized email service/program.

It's a big risk, which Google has always shown that it does that with air of authority and with a sense of "Oh! just try it, dude".

Came to know about it via mashable.com article : How to Integrate Facebook, Twitter, Buzz