There is something new in the advertising and promotion world; Entrecard. This is the new idea of Graham Langdon, the inventor of the Million Dollar Wiki. Entrecard is a way to trade business cards between bloggers.
Once you sign up for a new Entrecard account, you simply install the Entrecard Widget on your blog site. The new widget allows other Entrecard bloggers to drop their card on your wite, thus earning them one credit for every card dropped. Credits can also be earned by other bloggers buying an Entrecard advertising spot from you. Your 125 X 125 ad price is based on how many people have dropped cards on your widget and how many cards you have dropped.