The Fifth Ecumenical Council, held in Constantinople in A.D. 553, listed Augustine among other Fathers of the Church, though there is no unqualified endorsement of his theology mentioned (just as there is none for most saints of the Church): http://www.orthodoxwiki.org/Augustine_of_Hippo
We further declare that we hold fast to the decrees of the four Councils, and in every way follow the holy Fathers, Athanasius, Hilary, Basil, Gregory the Theologian, Gregory of Nyssa, Ambrose, Theophilus, John (Chrysostom) of Constantinople, Cyril, Augustine, Proclus, Leo and their writings on the true faith. (emphasis added)
In the acts of the Sixth Ecumenical Council (not yet translated into English), he is called the "most excellent and blessed Augustine" and is referred to as "the most wise teacher." In the Comnenian Council of Constantinople in 1166 he is referred to as "ÃƒÆ’Ã…Â½Ãƒâ€¦Ã¢â‚¬â„¢ ÃƒÆ’Ã…Â½ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“ÃƒÆ’Ã…Â½Ãƒâ€šÃ‚Â³ÃƒÆ’Ã…Â½Ãƒâ€šÃ‚Â¯ÃƒÆ’Ã…Â½Ãƒâ€šÃ‚Â¿ÃƒÆ’Ã‚ÂÃƒÂ¢Ã¢â€šÂ¬Ã…Â¡ ÃƒÆ’Ã…Â½ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“ÃƒÆ’Ã‚ÂÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦ÃƒÆ’Ã…Â½Ãƒâ€šÃ‚Â³ÃƒÆ’Ã…Â½Ãƒâ€šÃ‚Â¿ÃƒÆ’Ã‚ÂÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦ÃƒÆ’Ã‚ÂÃƒâ€ Ã¢â‚¬â„¢ÃƒÆ’Ã‚ÂÃƒÂ¢Ã¢â€šÂ¬Ã…Â¾ÃƒÆ’Ã…Â½Ãƒâ€šÃ‚Â¯ÃƒÆ’Ã…Â½Ãƒâ€šÃ‚Â½ÃƒÆ’Ã…Â½Ãƒâ€šÃ‚Â¿ÃƒÆ’Ã‚ÂÃƒÂ¢Ã¢â€šÂ¬Ã…Â¡ - "Saint Augustine."
I know that today, certain Orthodox leaders and teachers would prefer to not consider Augustine a saint, especially because of his influence in the Roman Church. On the other hand, to strip him of sainthood would be an attempt at revisionist history, in ignoring the past declarations of the Orthodox Church.
Some people gag at the idea of Father Seraphim Rose being canonized, due to their disagreements with certain aspects of his theology. But I ask you, what is more important for the people of the faith at large - heavy theological matters or the life that he lived, and the example that he set for other Christians?