Cunningham, (mephisto excerpt)

I saw this game on the post from Batgirl about the automaton.  I liked the mating variation and I see the g3 move often when I employ the cunningham so I thought I would throw this out for discussion.  I am wondering if anyone has seen this while playing as black and knows any sharp lines, attacks or traps.  If played correctly it is said that black will have an advantage over the g3 variation. (I don't know what it's called)