Thank you very much. CSV sounds like the way to go.
About the contexts, that is the main reason i like toodledo so much, but i´m kind of a project guy and for each project i use a folder (I´m doing research and live on a boat so my life is just about projects everywhere). So it´s really the number of folders that are starting to get too many to get a grip on, especially when using the iphone interface. But i was taking a better look at all preferences and plan to upgrade instead to get the subtask option. I guess that´s the easiest way to get the number of folders down.
Thanx a lot for great replies and an excellent service!