In alphabetical order...
Actionman - tips on Azurite mining

Bolverker - blending R&D and continued R&D
Cruzze - for corrections

ChojinMD - for the (yet to used) Dreadnaught nanoprints
Dethbringa - general R&D

Draco18s - lots of hard work on the maths used in crafting
Fippe - tips on Azurite mining
jams - Quartzite min/max corrections and generally productive criticism
Mavoc - for the more precise quality-grades

McWaffle - for the (yet to be used) Biotech nanoprints
Nerfbane - tons of spreadsheets and the man who cracked the blending formula

Jerry Thomas - additional Bismuth data
KarbonKitsune - Recon nano-prints and general support

KingBradley - Quartzite min/max corrections

Sayan - proof of Azurite blending
Starlightgamer - general R&D
Zprotoss2 - work-around for splitting stacks in beta milestone 1

And of course, the folks at Red5 who designed and built the crafting system. A huge thanks to Imbalanced, Virgil, Nic and UltimaSage for their hard work and support of RAWR.