The official website of the National Coalition for Syrian Revolutionary and Opposition Forces(etilaf.org) and few other websites have been hacked and defaced by Syrian Electronic Army.
In addition to Syrian National Coalition hack, the group also hacked into Masarat Syria (masaratsyria.com) and the City Council of Daraya (darayacouncil.org).
The hacked websites went offline at the time of writing, A mirror of the defacement can be found here:
In the meantime, the Syrian Electronic army also posted a tweet "How much does @Microsoft charge @FBIPressOffice ever month to spy on your emails? Stay tuned for their leaked documents. #SEA #PRISM".