http://myanimelist.net/anime/16706/Kami_nomi_zo_Shiru_Sekai:_Megami-hen/First episode out
Taken from the Reddit thread
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If you want to get started with the manga (I highly suggest it, so you can enjoy the details of all the arcs they aren't going to animate), here is a helpful chapter guide:
The first two anime covered chapters 1-42
The four-girls-and-an-idol OVA covered chapter 54-55
The Tenri OVA covered chapters 57-64
The Goddesses arc that is being covered by this anime begins in chapter 114, and ends in chapter 189.
If you've seen all the anime and you want to jump right in to the manga without going to the beginning, I recommend jumping to 43, the start of the arc following Jun's. You might choose to merely skim the parts covered by the OVA, but there are some details which might be missed that way.