Apple has been getting pro users pumped up by showing a trailer for the soon-to-be-released cylendar-shaped Mac Pro prior to select movies in theater. Here is the official 50-second video:
Personally, I'm really excited to see one of these in the wild. Apple says it will be released "this Fall". My gut says we'll see it in September/October (along with refreshed Cinema Displays). It's going to be a busy Fall for Apple!