Practically everywhere, to a point. I follow Escapist the most, lurk the site, watch a lot of the content etc. I might go to Destructoid for reviews, I find I prefer their reviews, especially if it's Sterling. Beyond that, I follow most of the gaming sites (not IGN, and possibly others I haven't thought of) on Twitter, if they Tweet about an article I'll check it out. It's a good system, I've found out about a lot of cool shit that Escapist didn't report on.
From the poll I follow Destructoid, Kotaku and Giant Bomb. And maybe G4TV, if I do I feel like they aren't all that active, since I can't actually remember if I follow them or not. There's also Rock Paper Shotgun and Gamasutra, that I can think of.