Thanks guys! As I mentioned, it was one of about a dozen shots I took walking home from the mall during a blizzard. The camera was virgin. I'd picked up an SD600 earlier, on sale for $250 tax in, as I was looking for something ultra-portable and *cheap* to replace my bulky a510.
So, the camera was brand new, literally a day old. I had little clue as to the settings and was just trying it out. That's why I called it a "botched series of shots", because it truly was.
The cyclist: taken with no flash (doh!) and wrong ISO setting, on a very poorly lit stretch of the main street. Taken from a stand-still position, by sweeping the camera to match the cyclist's speed. This usually results in an in-focus centre subject against a backdrop of blurry (rushing by) background objects. If you try this out in the daylight in a really busy downtown setting, following a car, bus, cyclist, or skater for instance, you can come up with some really fantastic results. If you do it right, the background detail will be slightly more in focus than in my shot, with the main subject remaining the sharpest, and the feeling of motion/speed will be even more realistic. I used to love taking these types of shots back in the day with my 35mm Zenith brick. These digital babies, I'm really finding a lack of time to play with.
There you have it.