Hi Hobbes, I have both cameras and have done side by side comparisons at the zoo, where I managed to get a few birds where their positions were almost the same for both shots. I agree with Tom, there's very little in it, image quality wise, which is what I was expecting. What I did notice, was that the FZ200 was consistently shooting at either lower iso's or if the same iso, then a higher shutter speed. This is the reason I got the FZ200, as it will work better in lower light. I have also noticed better bokeh in close up shots, but not a lot of difference there at more distant shots, compared to the FZ150. I am travelling in Canada and can't load up any shots for you to see at the moment, but after I get back home on 18th November, I'll be able to resize them and do some up loads. You can see the comparison shots on Flickr.
Here's a blue wren taken with the FZ200
http://www.flickr.com/photos/62434662@N05/8032073066/in/photostream
Here's another shot taken with the FZ200
http://www.flickr.com/photos/62434662@N05/8032072129/in/photostream/
Here's a comparison shot between the FZ150 and 200. THe FZ200 is marked
http://www.flickr.com/photos/62434662@N05/8019231345/in/photostream
Here's another comparison shot
http://www.flickr.com/photos/62434662@N05/8019235560/in/photostream/
Regards
Rodger