After a few hours of fiddling with the MT API and playing around in perl and php, I now have a semi-automated picture listing function in my Movable Type install. Which means it will take me considerably less time to add pictures taken with my camera.
When I have 2 seconds, I’ll polish the code and release it for anybody to use (the only advantage over the other plugins already available on MT’s website is that it does not require any exotic server configuration).