Just read about the G5 at dpreview.com - quite the unit! If you want, we can trade for a little while...
If you leave all the defaults, and pick macro mode, and find a way to steady that bad boy, I think you will find some amazing photos popping up. Of course, you'll need to practise by the hundred or so...
Check out "gregr" in the Photography forum at reefcentral, you'll be blown away by his work. I think he likes his G2 a lot, from what I can tell. Look for the Close-ups thread - yikes.