Sounds like your kitty is lucky.
Apparently cats metobilse venom differently to other domestic animals for example they are almost totally immune to funnel web spider bites. That said I'd be giving it a good look over an if there is any evidence of a scratch or bite i'd be off to the vets with it.
You want to watch for paralysis and apparently treatment with vitimin C works on cats:
http://www.cat-world.com.au/forums/i...n-snake-bites/
I'd want to check that with a vet though before I dosed moggy up with a bunch of crushed VC tabs.