Yup, selected a bunch, saved them, which was ok except...
Each mail saves as a doc with the subject as title. So if you save 20 emails with a thread like "Re: July Meeting" you have to manually change the filename saved. Subsequent emails must be saved as (for example)
Re: July Meeting (2)
Re: July Meeting (3)
etc.
Too bad - a good enhancement would be to automatically handle message threads by appending a number to the filename. It would have made a 3 hour task into 30 seconds.