Apple has announced the launch date for MobileMe as July 9th at 6pm according to a .Mac service status notification:
MobileMe Launch
7/9/2008, 6pm-12am PT
As part of the MobileMe launch, www.mac.com will be taken offline at 6pm PT on Wednesday, July 9th.
Members will be unable to access www.mac.com or any .Mac services during this time with the exception of .Mac Mail accessed via a desktop application, iPhone, or iPod touch.
MobileMe will be available as soon as possible during this maintenance window.
You can learn more about the new MobileMe service here
MobileMe Launch
7/9/2008, 6pm-12am PT
As part of the MobileMe launch, www.mac.com will be taken offline at 6pm PT on Wednesday, July 9th.
Members will be unable to access www.mac.com or any .Mac services during this time with the exception of .Mac Mail accessed via a desktop application, iPhone, or iPod touch.
MobileMe will be available as soon as possible during this maintenance window.
You can learn more about the new MobileMe service here