It has been nearly three weeks and we still don't have an answer from Parallels.
And the thing is they need to react before the Yosemite Public Beta is made available. Remember that even though Yosemite is in beta, REAL average joe customers are signed up for it, they won't understand the beta stuff, just that they installed something Apple offered them and PD doesn't work on it. They are gonna have a pretty rough time if they don't get ready before the public beta lands.