I got an e-mail from them a few days ago and it sounds like maybe the books will ship in April. This is from the e-mail
You’re receiving this email because you ordered our special edition of 'SALEM’S LOT by Stephen King and we wanted to share a new production update about this forthcoming book with you.
First, ALL EDITIONS of this book have now SOLD OUT pre-publication, which is great news for our collectors!
Next, the slipcases have been shipped to our printer, so the Gift Editions are being slipcased and shrinkwrapped right now, a process that should take about 10 days to complete. We expect to have the Gift Edition in our warehouse and shipping in April. We're waiting on the final approval of the traycase for the Numbered Artist Edition to confirm the shipping date for that edition, but the actual books are done now, so we just need the traycases to ship the orders!