First off, good job on the VVX600 Polycom! There are some really fantastic smart decisions that have been made on this phone. I am enjoying it so far and looking forward to developing with it.
The current copy of the SDK does not support a simulation of the VVX600. This is making it a bit difficult to work with as I have to make due with either the VVX1500 simulator to get adequate screen size or the VVX500 simulator to get the correct button interactions; will there be a SDK with a 600 simulation along shortly?
Also, for what it's worth the current VVX software implements a newer Webkit than the one in the simulator. This has some ramifications for things like websockets that are implemented completely differently on the phone vs the simulator. So I guess it'd be nice to see 1:1 releases all around.