Shameless plug. I've started a project to track any data that I want and stop relying on all of these free sites because of this loss of data issue. The source code is here: https://github.com/mcormier/tallyman and you can see it in action here: http://stats.preenandprune.com I haven't tackled generated graphs from the SQL data yet but plan to eventually. The one graph on the page was generated with Apple's Numbers.…
(P.S. My project is also heavily inspired by the features and shortcomings of Daytum (namely the lack of an API), which is frankly the best self tracking tool available at the moment.)