Using a Nokia N97 and the new functionality of Posterous, which is autopostr.
This is no 'groundbreaking' technology, but I only want to stress the ease of use. The very simple keyboard (which allows reasonable fast typing) of the N97 and its 5 megapixel camera are the base for this lightweight type of communication. The posterous autopostr updates posterous + blog by sending ONE email. Can't get any easier then that.
Could use a spellcheck though.