In case you want to remove, delete or disable Google Buzz from your GMail for whatever reasons, you can do so in a couple of clicks!

There are two ways you can do this. The easiest way is -

Log into your GMail account and follow these steps -

1. Scroll all the way down to the bottom of the page.

2. Click on Disable buzz.

Alternate access - 

a. Log into your GMail account.

b. Toward the extreme right-bottom of the window, you’d notice a grey gear icon, click on that and click Mail Settings.

c. Under Settings, click Buzz on the very right.

3.  Click on Disable Google Buzz.

4. Click on the desired options and click on Remove selected services.

Yes, Google Buzz will soon be merged/synced with Google+.