Thanks to Omar for pointing out this new GH3 Promo Video. There's finally an OEM battery grip showing on the GH3, and some of the text descriptions include up to 60fps frame rate, higher video bitrate ALL-I: 72MBPS, dust and splash proof magnesium body. Sounds like panasonic has a solid camera here with no hacks needed.
The Panasonic GH3 is already available to Pre-Order (Click Here)
Thew new Panasonic GH3 Available for Pre-Order