Remember that jar at your local coffee shop that always offered a little spare change when you were running low? The concept is simple: give and take. Jonathan Stark has taken the idea of give and take to a whole new level this week with his new endeavor Jonathan’s Card.

Jonathan’s Card takes an image of Jonathan’s personal Starbucks mobile payment card and shares it with the internet. The concept is simple: download the image of his card (find it here), save it to your phone and use it at your local Starbuck’s for a cup of coffee on Jonathan. Simple enough.

Jonathan has taken it a step further and shared the card’s account information, so now any stranger can digitally give a little to the cause. The card also Tweets balance updates, and based on the stream, there are more than a few people giving a little this week.

Take a look and give yourself a little digital karma – or even a cup of coffee today. Way to go Jonathan for letting us all know that no matter how down the economy gets, charity survives. Thanks to @Mattstech for his Tweet this morning and sharing the project.