Bulk model.save() operations?

I've been looking through the Backbone documentation and sidecar/src, but I can't see a way this can be done.

We have a custom view with a tree/table view that combines multiple custom models and inline editing/calculation rollups.  Dirty models are tracked, and then there's a method that iterates through all the dirty models calling model.save().

Is there any way to queue these up and use the bulk api to send those .save() requests?