This morning, Apple’s U.S. iTunes Store began offering six HBO series: “The Wire,” “Flight of the Conchords,” “Sex and the City,” “The Sopranos,” “Rome” and “Deadwood.” The first three are priced at iTunes’ standard rate of $1.99 per episode. The second three are $2.99 each, marking the first time Apple has allowed variable pricing for TV shows in the U.S.

Quite a coup for HBO (TWX), especially given some of the other concessions it was able to win from Apple: HBO programs won’t be offered for purchase on iTunes until they hit the DVD window, and new episodes of series won’t be available until months after their TV premiere.