Valve's Steam service quietly added a novel new feature over the weekend; the ability to add funds to a "Steam Wallet", giving you an online account balance just like you get with Xbox Live and the PlayStation Network.
The minimum amount you can add is $5, with further increments available at $10, $25, $50 and $100. This functions just like real cash, so you can spend it on anything within Steam's digital shopfront, whether it be games or downloadable content.
Now that it's here, it makes you wonder why it wasn't implemented sooner. These kind of things are easy money-makers for Microsoft and Sony, compelling you to spend your "spare change" on smaller games or trinkets, and the same will now be happening to Steam users as well.
[thanks everyone that sent this in!]