Thank you for your suggestions. I will definitely look into improving the focus/exposure controls for less stationary usage.
With regards to using the physical volume buttons, it seems Apple keeps changing its position on their usage as a camera trigger and have rejected such apps as recently as last April (http://www.ilounge.com/index.php/news/c ... r-changes/
). I am going to wait until I have a better indication of Apple's prevailing whims before attempting to implement it.
At the moment 4 shots are what I could fit in memory, I'll try to see if I can improve the save process to increase the count but I can't guarantee anything.
ISO display should be possible, I'll see how that fits in.