Welcome to the 150mm Macro club Matt. As has been said, you'll get to love it, but I think you'll also struggle to match some of the extremely good Macro shots you've managed with the FZ30. BUT you'll love not having to be so close! Extension tubes work well with it as well if you want to get really close, in fact frighteningly close.
You'll find the built in flash also works well with it, I often use 1/125sec @F20.0, with the flash. You'll need very low aperture settings to get any decent depth of field. This will be when you find out how dirty your sensor is!
Don't know why I'm telling you all this, you know it all perfectly well yourself!
