I’m using Posterous as my mobile blogging platform, if I want to post pictures to keep. It automatically adds them to Flickr too, and servers them to Twitter. I guess I could use Twitter as a mobil photo blogging tool, but its archive is less easy to use. Plus, Posterous is so quick and simple to post with, just send and email and be done with it. No loading times :)
I’ve added a link to Posterous in the sidebar, but I might add is as a RSS widget thing instead. Not sure what would work best :)