Starting with Google Buzz
Getting started with Google Buzz is easy. Just head over to Gmail and you'll be able to link up your Google Reader account with just a few clicks. Then, anything you share in Reader will automatically be posted to Buzz. Comments are even shared between both products, so you can view and participate in the conversation wherever you'd prefer.
Google Buzz in iPhones
Google Buzz is not available who is not lucky for invitation, but your mobile devices like iPhone and Android is available. buzz.google.com tweet from @luogl
Not invited to Google Buzz yet? Try http://buzz.google.com on your iPhone and log in with your Google credentials. Works! - tweet from @UmbertoGonzales