It looks like the final three SACDs (Andre Kostelanetz, Arthur Fiedler, and the Watership Down soundtrack) are now available at the D-V website, so I would imagine that orders that include these discs will be in the mail shortly, if they aren't already.
The next time I speak to Michael Dutton, I'll see if they can add something to their storefront system that will send out automated emails when preorders are shipped. I suspect they just aren't used to having the kind of fervent preorder-ers like we have here on QQ!
I think there have been a lot of great suggestions and spectulation on further titles from D-V in the last few pages as well, something I very much share. While I wouldn't get your hopes up for a pile of hard rock releases from them (as much as I'd like that too), D-V are very much aware of what's out there in terms of quad mixes, not only from their own knowledge but also from information I've provided as well as requests other people have sent in and they seem very keen on continuing this multichannel SACD push.
I do hope that everyone who's speculated on future titles has bought at least one or two of these current ones, because I think there's something in this batch for almost everyone (provided your tastes aren't too narrow) and at an almost no-risk price. The most effective vote you can make for more releases is the one you make with your wallet.