Sawbuck Gamer, the AV Club's bi-weekly collection of cheap or free games, mostly for browsers and iPhones. It's where I found Canabalt (which I still <3) and there are a few others I've tried which are neat. Dig through the articles and you'll probably find something fun and unusual.
Major Nelson's not posting the DLC and digital content for the week, so this list is surely incomplete. Feel free to chime in with whatever major things I'm missing. They converted from MSP to actual moneys this week.