Mujahedeen Message has not claimed an attack since 2003; however, some reports suggest that it is linked to elements of the Taliban, which remain a deadly insurgent force.

al-Qaeda Organization in the Land of the Two Rivers -- Faction

The Mujahideen Shura Council is now the organization which claims attacks perpetrated by its factions. To that end, the goals and tactics of the Council are identical to that of its member groups. The Council is dedicated to the removal of US troops from Iraq, and despite the apparent welcoming of nationalist groups, the Council seems committed to the implementation of an Islamic government in the region. <p><br />On October 15, 2006, the Mujahideen Shura Council, along with Jaish al-Fatiheen, Jund al-Sahaba, Kataeb Ansar al-Tawheed wal-Sunnah, and several tribal chiefs, announced through the Pact of the Scented People the formation of the Islamic State of Iraq. Abdullah Rashid al-Baghdadi has been declared the state's Emir of the Believers. Saraya Fursan al-Tawhid and Saraya Millat al-Ibrahim would announce their association later. The state, established to enforce Shariah law and protect Sunni Muslims, consists of Ramadi, Sunni areas of Baghdad, and the provinces of Anbar, Diyala, Kirkuk, Salah al-Din, Nineveh and parts of Babil and Wasit.  Subsequent attacks conducted by groups comprising the Islamic State of Iraq have been claimed by the Ministry of Information's official spokesman, Ali al Naemi. Due to its membership and the frequency and lethality of its attacks,  the Islamic State of Iraq and the Mujahideen Shura Council remain the main security threat in Iraq.

Lashkar-e-Jhangvi (LeJ) -- Other Affiliation
Lashkar-e-Taiba (LeT) -- Other Affiliation

Terrorist groups in Pakistan are constantly changing their names and reforming in order to avoid police scrutiny.  Although it is possible that MUA was a short lived umbrella organization for many groups, it seems more likely that the organization was actually a renamed version of one such outfit.  MUA has not been active since 2003.