How long exposures handheld?

Handheld, originally uploaded by jiihaa.

I have occasionally taken 1/4 and 1/2 second handheld exposures with the LX3, but nowadays I'm usually just using a mini-tripod in low-light conditions, or then using the motion blur as a element of the photograph. But today I tried how long I can go, and did a set of handheld exposures aiming for a sharp result.

This is the best example from the set, taken with a 0.6 second exposure (ISO 200, f/2.0). But the rest were not too bad either, only about 1 in 3 was completely unacceptable. If you look at the image in full resolution, you see some blur, but all in all it is not too bad, taking into account the length of the exposure. Rather good image stabilization on the LX3.