In an Exodia deck that I have seen played over the past couple of weeks, they were using a couple of combos, one old one new.  He was using the Butterfly Dagger-Elma, Gearfried, and Royal Magical Library.  This is an older combo and for those of you who don't understand here's how it works:  You have the Library and Gearfried on the field and you attach Butterfly to Gearfried and the dagger is destroyed, putting it back into your hand.  Repeat this over and over and every third time you do it your Library is letting you draw a card, infinite draw combo.  Another infinite draw combo that they were using was a Manticore of Darkness and Card of Safe Return combo.  This one is a little bit harder to pull off because of the way Manticore's effect reads.
 
    Manticore of Darkness
    [Beast-Warrior/Effect] ATK/2300 DEF/1000
    During the End Phase of the turn this card is sent to the graveyard, send 1 beast, Beast-warrior or winged     beast-type monster card from your hand or your side of the field to the graveyard to special summon this     card from the graveyard.
 
So if you can get one in your graveyard and one in your hand during the same turn along with a card of safe return you have another infinite draw combo.
 
His deck consisted of these cards:
 
Monsters: 20
5x Exodia Pieces
3x Royal Magical Library
3x Gearfried
3x Manticore of Darkness
2x Magician of Faith
2x Iron Blacksmith Kotetsu
1x Witch of the Black Forest
1x Sangan
 
Spell: 13
3x Mystical Space Typhoon
3x Card of Safe Return
1x Graceful Charity
1x Pot of Greed
1x Monster Reborn
1x Raigeki
1x Mirage of Nightmare
1x Painful Choice
1x Butterfly Dagger - Elma
 
Traps: 8
2x Bottomless Trap Hole
2x Backup Soldier
2x Trap Hole
1x Seven Tools of the Bandit
1x Imperial Order
 
 
If you have any rants, questions, or praise please feel free to e-mail me at azlegk04@yahoo.com.
Thanks: G Mo