PlusPlusBot makes sending good karma around the net as easy as using Twitter. In fact, it’s a Twitter based app which uses the simple language of pluses + and minuses – to express feelings good and bad.
For example, if you’ve been surfing around the wild web and during your adventures you meet some very cool so an so, you can let PlusPlusBot know by first adding the bot to your Twitter account, and second sending an update like this foo++ because he’s just that cool—foo is PlusPlusBot speak for your most favorite thing in the world. If something or someone has acquired your displeasure minus minus them (–). To send a direct message to the Bot, begin your message with !. To search for targets and view their rankings, use the search bar.
PlusPlusBot.com In Their Own Words
“Did someone go out of their way to help you? Is a web site being particularly slow and flaky? Make your feelings known with plusplusbot. You can ++ (pronounced “plusplus”) or — (“minusminus”) anything. Think brownie points (but archived forever).”
Why PlusPlusBot.com It Might Be A Killer
This is simple yet effective. Why use elaborate words and phrases when you could express your wrath or approval with pluses and minuses? So easy, and so practical. Let everyone know what you like, and what you don’t.
Some Questions About PlusPlusBot.com
Is this site worth the effort? You can do the same thing with Twitter and a handful of other applications. The site is pretty sparse looking as well, will there be added functionality? 
