I heard this a few days ago also, and I am excited about the switch to US friendly software. They will accept new players also, so even though no more microgaming for you guys (i"m already excluded due to WA) there will still be a few options. I'm curious what software they are switching to, they said it will be the same as microgaming etc.
Edit: I just talked to live support at Grand Mondial
and he said a new website for US will be launched and new players can sign up there, but for now they are not accepting new US players. GRRRRR