Great identification. Do you have much experience with the 'slime moulds'? I've just added this species to the species list so hopefully I'll be able to give you a full id on my next attempt!
Thanks Pam for the info and the ID - I didn't previously have any experience with them, but I came across a similar-ish photo in a rainforest species book. I'll be sure to keep my eyes peeled for more now, they look pretty amazing.