According to the Guardian, Obama's staff have been working on the letter since the day he was elected and there are currently three drafts under consideration. All of them aim to pave the way to direct talks between Iran and the U.S. — the first such contacts in three decades.
CBS News has not been able to confirm the that the Obama administration is penning a letter to the Iranian people.
It appears more likely with every passing day that direct talks between Iran the United States — as espoused from early in the Obama campaign — are in store.
What isn't clear yet, and won't be until after the first contacts (at the earliest), is what can be achieved by the two nations which, despite new U.S. leadership, still do more accusing and finger-pointing than talking. (Here's my take from yesterday on the challenge of "unclenching" proverbial fists from yesterday.)