A seemingly dumb question, but remember...Greg Tech.
Redstone drops as an ore when mined and probably needs a macerator/pulverizer/lacerator to get the dust, but can't craft those machines without first having the RS Dust. NEI recipes show smelting the ore to get the dust, but that doesn't work in either the vanilla furnace or the slag furnace from Factorization.
The GT Hammer (4986:12) text (on NEI mouseover) says "Crushes Ores instead of harvesting them", but that isn't the case. It drops ore blocks.
Is this a bug? or is GT going to make this modpack grind to a halt. Cannot really make any tech machines without redstone dust for basic items like circuits and pistons.
I gotta be missing something. Please chime in.