Well, I blame Obama in the sense that he is the Chief Executive and these things happened under his watch. He is, in that sense, responsible. I don't know of any information linking him directly to this fiasco.
Someone should be facing jail time. And it should be someone at the national level, not at a local bureau. I imagine a large civil suit against the government will follow when the dust settles.
For those saying they would have gotten arms anyway: Can the administration now distribute illicit drugs to the public? When people are killed or harmed by those under the influence, would not the government be liable? I suspect if people were dying in your neighborhood, your tune would change.
And lest I sound like a partisan hack (I'm a libertarian, for the record), if it is discovered that Operation Wide Receiver was, in effect, the same-type operation as Fast and Furious then the appropriate people in the Bush administration should be drug into court as well.