A Canon PowerShot S3 IS (
http://www.dpreview.com/news/0602/06022111canons3is.asp ). The camera fits in 1/2 of the Topeak bag "just right" with the lens pointing towards the center of the bag (I'd take a picture, but...uh...I'd need to take out my camera to take the picture

). The bag has a little adjustable divider so I set it up so that the camera is nicely buffered by the lining.
I really like having the camera in the handlebar bag--I don't have to worry about it and when I want to stop and take a picture, it is right there.