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3 GH/s Bitcoin mining ASIC sold by Butterfly Labs.
Chip was advertised as 65 nm tech and is obviously ⇐ 130 from a top metal view.
Designed by Chronicle Tech (now Custom Silicon Solutions) and made by IBM, most likely on their 10SF process.
From preliminary optical views the device appears to be one thick aluminum layer on top, then several thinner copper layers. MOSIS's page on 10SF suggests that the process has four 1x layers, three 2x layers, and two 4x layers (metals used are not mentioned); it appears that only one 4x layer is used in this design.
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Markings:
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Dimensions are approximately xx μm x xx μm (xx mm2)