I use them for work and have had them repaired twice. Luckily I was in India at the time and only cost me $30 to repair/replace parts.
I have the G9 & G12. The G9 was awesome but it too succumbed to the lens error jam, it was a favorite.. The G12 is too big to carry around and the s100 had better video. The G9 also had really good video and stabilizer.
I wish I knew about this earlier as it just happened again to me in Europe and finally gave the s100 to one on my employees who was going back to India. Living here in the States I figured it was going to be too expensive to repair as oppose to buying a new one.
It's painful to have the lens half open leaving me no choice but push forcibly the lens back in. This will work if you have no choice and it will ultimately break the worm gears in the camera but only do this if you have no other choice and understand the camera is already screwed but if you need to get a couple of more pics/sessions out of the camera then this could work.