Hi douglaswa,
I want to assure you that we do read the posts and relay the information internally. As is well known, Apple's focus is on hardware and iOS devices. Parallels makes software, and the reason we posted this notification in September is to allow our customers time to make a decision, instead of the day of Mavericks release. I laid out the points in the initial post that it was not technically feasible (or from a resource perspective) for Parallels to back-port Parallels Desktop 7 as it is two years old.
I do not want to set any false expectations to any of our community members when I say that we do discuss your questions/comments internally, but there will not be an update to Parallels Desktop 7. If you are on our email list, you will receive any notifications from our Marketing team if there are any promotions that will be held in the future. If you find a copy of Parallels Desktop 8 for Mac, from an authorized re-seller, please keep in mind that the Parallels Tech Guarantee is in effect until October 31, 2013.
Chris