Google is pushing it twitter killer, called Buzz. Joining is super easy if you have a gmail account, and eveyone should have a gmail account. Don't get me started as to why. (BECAUSE I SAID SO.)
Since is google your buzz will certainly searched by the hoards of google users, so. .
The thinking is Buzz about a topic that covers your clients service or products, with a link to their site or specific web-page. and you create traffic.
are the gears turning yet?