I haven’t seen this reported anywhere else, so I might as well throw a post up about it. Valve recently launched their Steam Wallet feature, which was widely reported, but I just found a way to add custom amounts to your Steam Wallet (so you won't be stuck with leftover pennies). If you're logged in and access the Steam Wallet page, you can add specific increments. If you look into what the actual buttons are doing, they're all just using a javascript call to add those amounts, like "javascript:submitAddFunds( 1000 );". As this gives you...