Hi, I'm back.
In less than 3 days after I re-purchased a wireless adapter and picked up a new 12 month membership my console RROD'd twice at random, both times following short periods of activity. However, it seems to be closely related to eletricity/grounding issues my house has been experiencing ever since some recent road construction in front of my place. But, none of my other appliances have been effected by that at all. Regardless, I think I've solved it for now, messed with the outlets and tested out a variety outlets/surge protectors. I'll have to test how stable it is with more Borderlands 2.
But yeah, I just got back in the door and I may be right back out of it if this turns out to be a recurring problem. Or maybe my 360 is just dying again, I'd be less surprised by that. Fortunately black friday is right around the corner; maybe I'll pick up the cheapest new Slim I can get my hands on.