found some inside shots
I am sure you can fit more depending on how you arrange the dividers.
as far as non-camera cargo room, the flat front pocket is made for a laptop, but if you dont need to bring one, it works great for a jacket or light sweatshirt or flash gels, etc. There is a "goggle pocket" which is that top front pocket with the horizontal zipper if you look at the stock image.
Also, there is a main storage spot behind that pocket, this is big enough to easily fit my d50 w/ 10-20 or 17-55 attached with room to spare.