http://www.theinquirer.net/?article=27400
Apparently this is going to be launched around the middle of this month. It is the Inquirer I know, but apparently this has been in other places. One can only hope a PE version of the X1800xt is in the works, maybe for launch with the regular xt in limited quantities at least.
According to eVGA's forum moderators, their GTX 512 is ready to go, just waiting for nVidia to give them the go-ahead. Expectation is that it'll be mid-november