The plugin can now export animations (not DSQs yet). It expects to find a pair of "name:start" and "name:end" markers in your timeline for every animation. The F-Curves for XYZ Location, XYZ Euler and XYZ Scale will be exported. To specify more settings for animations, create a new Text Block named "Sequences". Each line should be of the form "sequenceName: flag1, flag2, flag3". For example:
spin: cyclic, blend 2
ambient: cyclic
The possible flags you can use are cyclic, which makes the animation loop; and blend <priority>, where <priority> is a number—this will make the animation blend with animations playing in other slots using the given priority.
You can also add the line "strict". This makes the export process fail if any markers were encountered that didn't have a line in the sequences file. If you don't want any flags for a sequence and are using strict mode, you can just write "sequenceName:" for that given sequence.
The animation exporting definitely isn't done: at the moment it won't precisely evaluate keyframes on fractional frames, and it creates more keyframes and node-matters than is strictly necessary (it still works fine, however).
The importer will also try to import animations (and the Sequences text block), but not all animations are imported correctly right now.