Oath is probably one of the most controlling decks in the format. Its only other contender is Control Slaver and formerly Gifts. The big problem that Oath has is that it has to keep control for 3-4 turns in order to have time to win. If Oath could win the turn it triggers then I think it could be a real contender. I have been seeing lists lately that run Tidespout Tyrant which can lead to infinite mana. The best list I have seen so far I found on
http://www.morphling.de/ and it came out of Germany. Cutting Gaea's blessing seems insane but I think that it is one of the best ideas I have seen in a long time. Without it in the deck you can run things like Recoup, Krosan Reclamation, and Deep Analysis from the yard with your infinite mana and then go for a storm card FTW. Here is a copy of the list which got 4th:
1 Black Lotus
3 Chalice of the Void
1 Lotus Petal
1 Mana Crypt
1 Mox Emerald
1 Mox Jet
1 Mox Pearl
1 Mox Ruby
1 Mox Sapphire
1 Sol Ring
1 Demonic Tutor
2 Duress
1 Tendrils of Agony
1 Yawgmoth's Will
1 Ancestral Recall
4 Brainstorm
3 Cunning Wish
2 Deep Analysis
4 Force of Will
1 Lat-Nam's Legacy
4 Mana Drain
1 Rushing River
1 Tidespout Tyrant
1 Time Walk
1 Krosan Reclamation
4 Oath of Druids
1 Recoup
Lands (15):
2 Flooded Strand
4 Forbidden Orchard
2 Island
2 Polluted Delta
1 Tolarian Academy
1 Tropical Island
2 Underground Sea
1 Volcanic Island
Sideboard:
1 Brain Freeze
1 Chain of Vapor
1 Echoing Truth
3 Energy Flux
4 Leyline of the Void
2 Pithing Needle
1 Rebuild
1 Stifle
1 Vampiric Tutor
Personally I would build it a little different but that doesn't change the fact that this deck gets away from Oaths major flaw, needing extra turns after the trigger to win. Oath is also one of the few "combo" decks that easily negate Mindcencor as stated above.