Having just bought a Case Logic US50 camera case for my Canon Powershot A95, I felt it might be approriate to share my views on it.
This bag is the perfect size for my Canon Powershot 95. The camera sits snugly in the front bag with the grip on the camera within easy reach. There is enough room left to store the wriststrap on top of the camera so that is not left dangling. The second compartment opens almost to the bottom of the case, so there is easy access to all compartments. There is plenty of space for spare batteries (4 AA's) and a couple of CF cards. The bag is easy to carry across the shoulder. There is a possibility to carry it on your belt, but for that it is just a bit too bulky.
To sum up, recommended for the Powershot A-series, seems to have been custom-made for it.
Might I add that I am not affiliated with Case Logic in any way, I just like the bag so much I want to shout about it :-)