Maybe for you but streaming in the US rocks. All TV courts are on USOpen.org, ESPN/Tennis Channel have coverage all day and night, as well as Watch ESPN online.
We can`t see the Us OPen watch live if we don`t live in the US.
Only the Australian Open leaves you watch the live streams in ther official page. I Remember myself watching a doubles matches this year, Paes/Sextepanek vs 2 mugs.
Here we have 2 ESPN channels, but they show only argentinians players and the main matches, including WTA mugs ...