Ouch! The DCS Pro Back for medium format was an absolute killer piece, I looked at it with stars in my eyes at Photokina on a Contax 645. And now it's being discontinued. Really a shame. The flexibility of modern medium format systems like the Hasselblad H1, the Contax 645, or the Mamiya 645 AF is simply greater than with 35mm SLRs.
I found the original article at PhotographyBLOG.