I have never heard of this little bugger. I've never liked spiders growing up with black widows... but holy crap! This thing is scary!
http://www.huffingtonpost.com/2010/01/21/killer-funnel-web-spiders_n_431121.html
http://www.youtube.com/watch?v=bkzlINZsXu8
this last one is nuts (the webs are so spooky looking)...
http://www.youtube.com/watch?v=o_ceZDcO4q8&feature=fvw