For those interested in an alternative to Sigma Photo Pro, I just received this message in response to an inquiry. Please note that Irridient already provides support for the SD1.
"The DP1/DP2 Merrill models will both be supported in the next update which should be out soon (weeks).
|Ruby Red Dress by cjf2|
from High key portrait with RED
|Follow me home by eaa|
from Shades of Blue in Nature