Given the performance issues we've hit with 0.9.x and sqlite3 as a backend (see here), I've managed to get a good conversion of an sqlite3 dump in to a format that mysql can load to migrate from one to the other. It's attached. Unfortunately its in C# because I had VS2008 to hand, but the source is there and its not long, so I'm sure someone could convert it to a scripting language of your choice
{{#tags}}- {{label}}
{{/tags}}