Erev Rosh Chodesh
We already know that the Queen will be in attendance, so who else is going?
Medvedev to Attend London Opening Ceremony - Official
...Britain’s Foreign Office has said some 120 heads of state will attend the opening ceremony, making it the biggest ever top-level international gathering.
...first lady Michelle Obama will lead the U.S. delegation to the Olympic opening ceremony. There has been no word of President Barack Obama attending the games,.... (Source)
Who's not going?
Mahmoud Ahmadinejad: Why I won't be going to the London Olympics
Iran's president, Mahmoud Ahmadinejad, has said he would like to come to the London Olympics but will not be attending because Britain has "a problem" with him.
His decision to stay away highlights a dilemma for the British government, which faces an unprecedented influx of leaders from unsavoury regimes for the opening ceremony on 27 July.
Does he know something the rest of them don't? If you find any other names of heads of state attending the Opening Ceremony, please add their names in the comments section.