I just ordered one for my Panasonic FZ5, and I'm excited! Although I imagine it will take some practice to get stellar results.
Have you had experience with one?
I took this picture in the Sassafras River off the Eastern Shore of the upper Chesapeake with a close-up lens.
Here is a link that might be useful:
What lens was it, Kegz? Has it required much practice?
I'm envisioning having to delete a lot of images, but it won't be the first time.