I, too, ordered both DVDs shortly after the project was announced. I saw Scott Williamson show some footage at the PCT conference up in Seattle more than a year ago
I've been disappointed by the numerous delays as well, and I have written the project leaders of this endeavor. To their credit, they responded to my missive. I sincerely believe they have every intention of getting the project out, but like most people, they have jobs that do get in the way. I do agree that the announce-date-and-push-back game isn't the ideal way of handling this, but as anyone who ever edited video footage would tell you, it takes a tremendous amount of time.
From the latest postings on vimeo, the website hosting their video samples, the project leaders did suggest that the movies would finally come out this summer. I made the suggestion that they be plaintive as possible and periodically send out email/website updates so those of us who plunked down the money could get some idea of when to expect a release. Personally, I am willing to continue the waiting game, only if for no other reason than the footage I've seen looks very promising.