I'd say mostly Sunni.
Hizballah in Lebanon is a Shiite group, supported by Syria, which has a Sunni majority population but an Allawite (Shiite) government. Iran's Shiite, too, of course.
In Iraq, the young Shiite cleric Moqtada Al-Sadr set up a large militia last year, but a combination of US attacks and mainstream Shiite condemnation seem to have shut him up.
The Sunni tribesmen from Anbar Province are the real hardcore bastards in Iraq, and they're the ones who work with the terrorists coming from all over the Arab world to fight and die in Iraq.
The Taliban and Al Qaeda are obviously Sunni. The Wahhabis who finance most of the extreme Islamic education worldwide that produces terrorists are Sunni. Most Pakistanis are Sunni, including, I assume, the London terrorists. And the Egyptians are Sunni too.
The three main sources of Islamic thought - Egypt, Pakistan, and Saudi Arabia - are all Sunni.
Do you know if Shiites and Sunni worship together outside the Islamic world or are their mosques "segregated"? From what I've read, they don't like each other too well and in fact despise each other due to a historic chasm in prophets and leadership way in the past. I would also like to know if there is animosity due to racial heritage. I know Iran is primarily Indo-European ancestry while most of the others states are Semitic or Arab in heritage. Does anyone know what sect is in the majority in the Phillipines and Indonesia