I use a Raynox DCR-250 with a pana FZ30, I recently got a DCR-150 (but I've not had the opportunity to use it in anger yet). You can see the results of the Raynox in my gallery and there are more on flickr:
http://www.flickr.com/photos/overton_cat/sets/
The closeup filters seem awfully awkward to me. I suspct that you'd end up sticking one on the camera and leaving the rest at home.