Hi MrAk,
Yes, I am Technical Marketing manager at our headquarters in Taipei. Unless there is any last minute delay, we are still looking good for early July on the shelves. We originally planed this time frame as we wanted to get Intel P45 development done first.
The 790i chipset's main strength is obviously SLI support with native PCIE 2.0. While the 780i offered PCIE 2.0 support, it wasn't native in the chipset, so if any Nvidia board is going to get the maximum potential of the GTX 280, it will be the 790i board.
In two weeks time or so, keep your eyes posted, as we will be sending out samples of our 790i board to the media, so you should be able to see some performance numbers soon.
Cheers,
Colin