I have not seen this posted yet, but just saw that the ZS100 is on sale for $548 and includes a $100 GC this time, but not the extra accessories. This is a great deal for a well reviewed camera.
I have not used this, but had to decide between this and the LX100 and ended up going with the LX100 because of the larger sensor. The ZS100 has a lot going for it with the longer zoom. It was a tough decision between these two.
It should be noted that the ZS200 is on its way, but has a pre-order price of $800.