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There is no T/S H/C lens currently available from Hasselblad. Speculation has it that one is in development. Currently the widest H/C lens is 28/4, and benefits from DAC corrections in Flexcolor ... plus perspective and distortion corrections can further be applied in PSCS2 & 3.
Many photographers use the 39 meg Hasselblad back from the H3D (or any other brand like Phase One or Leaf Aptus ) on a 6X9 view camera.
I personally use a Rollei Xact 6X9 with a super-wide Rodenstock 28/2.8 Digital lens for wide angle architectural work. The back mounts on the view camera by means of a sliding adapter from the Kapture Group that has the back's capture area custom etched on the ground glass. Kapture Group also offers dual and quad capture sliding adapters to allow for panoramic image stitching facilitated by Adobe's new HD layering and stiching features in PSCS3 : www.kapturegroup.com