Instant Buzz is officially public now, well for at least the next 4 days.
It is a great free way to generate traffic to your website, and it doesn't take any effort. Just install the toolbar, tell it what advertising message you want, which website, and then just carry on as normal.
There are also lots of strategies to multiply your traffic by promoting instant buzz on other traffic generation systems, thus building a massive downline.
I have found it to be a very effective tool to promote websites I am interested in. If you take your website promotion seriously, signing up as an elite member gives you massive benefits.