I'm an old-time MtG player, and was looking for a way to capture the boxes of cards in a database without creating one, etc. I'm glad for the site - and I, too, think there's a need for export of the data - via 'print', with selectable columns, and via 'csv', where values are separated by commas.
Further, I've looked around, haven't seen any way to give back - if there's a link to send donations, etc., then that would work for me (I may be tempted to send some dual lands or similar:) ). Alternately, if the site's written in PHP, I could toss in a couple hours of effort.