Owner contribution
Although the H-14 Holster($78.95) can be used alone (with it's included B-shape shoulder straps), I've decided to attach it to the TS-308 Sling Case Carrier ($46.98) for additional storage space and carrying comfort. The two can be attached together securely by their interlocking inserts and velcros. The H-14 alone is basically a longer version of the H-12 featured at cambags.com, which the two side pockets are long enough to hold a Canon EF 70-200mm F/2.8 IS lens. The main compartment is long enough to hold the 30D with a Tamron SP 24-135mm Lens and still have enough space below for me to add a piece of Kata's reinforced separators to separate the Flash diffuser and squeeze pump. Alike the H-12, front flap has storage space for filters and front pocket of main compartment has space for a battery and memory card holder (included with H-14), as well as a 30D spare battery and some lens caps. The S-308 has two zippered pockets and one velcro pocket for wallet, cellphones, cleaning solutions, or other misc small items. The front side has a padded large zippered pocket with enough space to hold the CP-E3 Battery back as well as the Charger for 30D's battery. You may also include pens, notepads, maps, and other misc items in that large pocket.
What works
Quick access to everything (Pros of a sling/shoulder bag), and enough space to carry decent amounts of equipments, without having to carry a backpack. Very comfortable to wear even with the heavy weight of equipments such as the Canon 70-200mm F/2.8 IS
Room for improvement
Does seem a bit large and thick to be a sling bag.

