I have almost nothing to add to Charles Krauthammer's critical year-end review of the Obama administration's blundered handling of Iran. The article's recounting of "a year of spectacularly squandered opportunity" deserves to be quoted in its entirety. Here is the conclusion (with which I have previously concurred):

One way or the other, Iran will dominate 2010. Either there will be an Israeli attack, or Iran will arrive at -- or cross -- the nuclear threshold. Unless revolution intervenes. Which is why to fail to do everything in our power to support this popular revolt is unforgivable.

Climate change scandals and bickering over health care reform are silly trifles in comparison to the potential global effect of a nuclear Iran. That such a looming danger has been relegated to second-tier priority status by the Obama administration suggests the un-seriousness and continued naivety of this president. Lone maniacs with underwear bombs on planes will seem like the good ol' days if Iran asserts control over the Middle East or begins marketing nuclear weaponry to the highest bidder.

WaPo covers the continuing opposition movement in Iran, and Powerline sums up a good post on the issue with the assertion: 

Obama needs to speak. And he needs to say that the U.S. is abandoning its policy of "engagement" -- what has it gotten us? -- in favor of tough sanctions. In addition, he needs to declare in clear terms his support for the aims of the dissidents, not just his unhappiness with the methods the regime is using to beat them back.

NB: National Review Online touches upon Iran here and here.