A friend of mine wanted a geeky diaper bag so I promised to make one for her. Here is the final result. It has 14 pockets total- 6 outer pockets and 8 inner. I designed it myself and made it all according to the measurements I marked out. The 6 outer pockets include one large slip pocket (perfect for a laptop, notebook or changing pad) on the back, 3 small slip pockets on the front, an elastic bottle pocket on the side and a velcro flap pocket on the other side. The inner pockets include a zipper pocket, 3 small slip pockets and a medium slip pocket, a diapers and wipes pocket (could be used for other things though) and two more bottle pockets with elastic. There is still lots of open space in the center for lots of other stuff. The inner bag measurements are approximately 15" x 4" x 10". There is no closure on the flap so it can be left open or flopped over an overstuffed diaper bag (because mammas know they fill up fast).
Right now it just has a bunch of random stuff in it, but I plan on packing it full with things she can use for baby too.