Steve’s Digicams review of the Optio A30 says if you want an ultra-compact, then this one is worth a good look-

"While it did produce images with good exposure, and color saturation, I noticed some edge softness on the left hand side of several of our samples as well as vignetting (darkening at the corners of the frame.) Image noise is almost nonexistent at ISO 100 and below, becoming more noticeable as you increase the sensitivity. While it is much more noticeable, at ISO 800 and below the images are still usable. However 1600 looks pretty bad, and the 3200 (5MP only) setting when using the Digital SD scene mode is even worse.
…
Pentax has made a great improvement over the A10 from last year. With 10-megapixels, 3x optical zoom, Shake Reduction technology, a durable all-metal body and plenty of exposure modes, the Optio A30 is an appealing "ultra-compact" model."

Pentax Optio A30 10MP Digital Camera with 3x Optical Zoom with Shake Reduction System