Just thought I'd revisit this issue and give some insight into a great camera bag. After messing around with a number of bags I decided to go ahead and get the Ortlieb handlebar bag with the camera insert and it is perfect. Anyone who likes to carry a camera (I commute with mine every day, ya' never know what you'll see along the way) should look into this bag, it's great. It's sturdy enough to handle my D300 SLR with a heavy 24-70mm Nikon lens with some room to spare for odds and ends. I purchased and extra bracket so I can attach the bag to either of my two bikes in seconds.

Thanks to the folks that suggested this bag.