While geeks are flocking to Blippy to see what their purchases say about them, Portland’s Kate Bingaman-Burt has taken a decidedly low-tech approach to reminiscing about what her buying patterns look like. Obsessive Consumption is a painstaking reconstructive sketch of 3 years of purchases that document the artist’s outward expenses and inward behavior. Unlike the generic and beveled charts from expense software that seem significant but say nothing, Bingaman-Burt’s playful voice and honesty reveal truths about all of us and our relationship to the things we buy. Un-ironically, you’ll have to buy this in order to be fully satisfied by what it has to say.