Well, here is something I found. Steamblocking goes under "dry blocking" as well.
Wet blocking means that you immerse the block, garment or textile in water, followed by careful pinning to a blocking board or, in the case of a large quilt, the rug on the floor. After pinning, described below, the textile is allowed to dry in the shape and dimensions you give it.
Dry blocking means the item is completely dry when you pin it into the shape and dimensions you want. You add moisture in one of several ways.
* You can spray it evenly with a spray bottle
* You can pass a steam iron over it, not on it
* You can use a commercial steamer
Hope that helps