I know WebTV on rutelevision.com has a sports channel (NTV Plus) that will be showing it.
It costs money though
. $15US per month. They show other tennis things so you probably wouldn't just be paying for this tournament.
The TV guide for the channel is here in Russian:
Kremlin Cup is on where it says this: Кубок Кремля - 2007
Personally, I don't like the idea of paying for something not very official although I may reconsider that in the future.