Entrecard

I have been getting some cool traffic for my blog from a website called entrecard. Entrecard is the first and only free exchange network for 125x125 ads. Through this widget exchange you can advertise your own 125x125 Entrecard on any blog in the network, for free, for a number of days.

You pay for this advertising with Entrecard Credits, that you earn for free by networking (a.k.a. visiting blogs and dropping your card for other bloggers).

Its only one month old and already growing fast. Its very user friendly and being updated all the time with new options. Soon you will be able to buy more than just advertising with your credits.