When we download our Twitter archives, which is supposed to be possible before the end of the year, what format will it be in?
Update: At least one person seems to think this will enable people to switch to a different service. Not clear until you know what the format is. And what the terms are.
My bet would be on JSON, mainly based on a previous experience with Twitter. When I requested my own data with Twitter in April I received my data in JSON: http://www.annehelmond.nl/2012/04/17/what-does-twitter-know-about-me-my-zip-file-with-50mb-of-data/