I just take the shot with the lens wide open when I need to. With my GA645zi (great camera), I can hand hold 1/15 pretty regularly. Here is one example that I know was at about 1/15 (maybe 1/8) by looking at the page turning. Technique coupled with a soft release can allow you to get pretty low with this camera. Now, if I could quiet it down, it would be perfect!
I think my technique is pretty good, yet I'm not getting much focus. It is disappointing. I need to do the test described above.