Hi Parka,
The camera was set at Aperture Priority actually, so this is what the camera automatically set itself (I found the shutter speed odd also).
To answer your second question abt the IS, it tends to be a mixed bag, I would say you will get AT MOST a 2 stop advantage than w/o IS, and even with the IS I would say the performance of the CCD-shift still needs quite a little bit of work, as compared to Canon's IS (I was seriously considering Canon's Powershot IS 710) or Nikon's VR in their compacts.
It could also possibly be due to my hands being very shaky, its quite hard to get a proper grip on such a small fella and I do have rather large hands. However, the high ISO capabilities of the camera more or less makes up for the somewhat unimpressive performance of the CCD-shift.