Magpie is a service that distributes online advertising through Twitter. Not in a hard sell kind of way, but in a conversational marketing kind of way. You, the advertiser, get to choose how much a particular keyword is worth to you. Then Magpie will target your keyword to a Magpie member who is also a Twitterer. Your ad will be tweeted from that person’s account and their followers, and anyone else following your keyword, will see your ad in the Magpie-Twitterer’s Twitter stream. How cool is that?
Since this is a relatively new service, you can get in on the virtual ground floor here. Your keywords will not cost you an arm and a leg as so many at Google do. And you don’t have to be a Twitterer to advertise. You can actually run your pay per click campaign through Magpie without yourself having a Twitter account.
So if you are looking for pay per click advertising opportunities outside of Google and Yahoo! Search Marketing, Magpie just might be the low-cost avenue that you need.