The one issue about labs from a HIE is that there is a special hidden code called something like LOINC that has to be with the granular labs to make them count for MU purposes - hopefully that will eventually get ironed out.
I think it is funny that we want special order sheets - granted ours is a little hospital but they take the AC order sheet without an issue at our hospital (I guess the 2-3 million per year in charges is something they want to keep). Our hospital sheet is actually something with carbon type copies and you circle and then print diagnosis - AC orders are much better.