More seriously, I come with a question.
How would you people see such a feature for bulk importing cards?
One way would be to just keep the existing Add many textarea, and make a convention on its contents. For example we could define the format as:
(Magic 2010) 3 Lightning Bolt
(Alpha) 2 Lightning Bolt
Then, of course, people who have collections stored in excel have to somehow export them into this format, then paste them in the import box. We could also make the format closer to a CSV format, like
3|Magic 2010|Lightning Bolt
Other solutions would entail the presence of a separate dropdown field for the edition - so that you would paste in the box all your cards from Magic 2010, then select Magic 2010 in a dropdown and click import. Then paste all your cards from Mirrodin etc etc.
I lean in favor of the first solution. What do you guys think?