EncodedNybble on 25 May 2010
From what I can tell, not an app, but just that they get the episodes on the video store. But lines like this
"The agreement will allow PS3 users to pay a premium price to download episodes from 11 HBO series, like Big Love, Curb Your Enthusiasm, and Entourage, as they become available for sale in the DVD format roughly 11 months after premiering on the network."
Don't make sense if it is just in the video store, but it'd really be foolish to do otherwise as an app. Who knows.
