There seem to be about a million ways to pronounce the President of Iran's name, but I'm pretty sure there's just one right way. The key is to recognize that the name is really two words crammed together: "Ahmadi" and "Nejad". Before he was in the news so much, the name was often spelled "Ahmadi-Nejad" or "Ahmadi Nejad", which makes it more easily spoken by westerners.
The first part, "Ahmadi" is the most significant because it identifies the President as a follower of Mirza Ghulam Ahmad. (Not sure if he actually believes that stuff, or if it's just in his name.) I think the second part, "Nejad", is a town or region in Iran, but I'm not sure.
So I believe the correct pronunciation is: ah-MAH-di-neh-JAHD.
I usually pronounce his name as AH-mah-DIN-schwa-jack-ett.
That's a schwa, not "schwa," if you know what I mean. I couldn't figure out another obvious way of representing the sound, the standard upside-down e not being easily available to me.
I don't know about you guys, but I like to pronounce it either SAY-tehn or BEE-ehl-zeh-BUHB.
Sorry, that was just too easy.
Yesterday morning on Hot Air, there was a vlog by Robert Spencer of Jihad Watch, who repeatedly pronounced it AKH-mah-DIN-neh-jad, FWIW.
Glenn Beck just calls him President Tom. Works for me!