MAXtoA Version 0.9.608 is out. More information here.
Saber Jlassi has created some incredible pyro simulations, rendered with Arnold for Houdini.
He also has a youtube channel with Arnold rendered pyro animations.
Thrilled to see my colleagues at Solid Angle win a Science and Engineering SciTech Oscar award. More information here, here, here and here.
Zeno Pelgrims has updated his camera shader for Arnold. It is capable of simulating optically imperfect lens effects.