You can give out everything in the game. THe only thing I have found that can't be spawned is a Pickaxe and a campfire.
If you want to spawn a item that has two words: inv.giveplayer playername "Wood Doorway"
You can spawn a camp fire by typing "Camp Fire"
and a Pickaxe as you said cannot be crafted !,
also,
I spotted a problem with spawning an item with the inv.give "Holo sight" as the s is not Capitalized
as is every other spawn-able item in the game !
All blueprints I have used inv.give with no problems,
sleepers.on false does not work...
I will post bugs when we get into the "Beta" stage of the game
Tony