Iran-Iraq relations???

http://www.radionetherlands.nl/news/international/5666601/Iran-leader-accuses-US-of-terrorism
I read this article on Radio Netherlands Worldwide about the Iranian President Mahmoud Ahmadinejad visiting Iraq. In the article it said that it was the first time that a Irani president has visited Iraq since Saddam Hussein launched an eight-year war with Iran that by 1988 had claimed a million victims. During his visit President Mahmoud called the United States a terroriest. He said that the U.S. brought terrorism to the Middle East in 2003 when they invaded Iraq. However, since the U.S. has removed Saddam from power it allows Iran to have contact with Iraq now. This makes me wonder about a few things. One is that since Iran and Iraq have there majority of thre population being Shiite, I wonder if this will increase the friendlyness of the two countries. I think that this could cause a problem for the U.S. since Iran is calling them terrorist. I also wonder how this new relationship would effect the rest of the middle east. I am also wondering what the U.S. thinks about this and if there going to try and do anything to stop it. Well Tell me what you think.
Thanks
Austin Conners