I believe the items you are requesting do exist. Many feature requests are pending on the export function, though.
As far as importing goes, if you have a CSV file in the format of
# Name
# Name
# Name
If you go to your Inventory and click ADD CARDS you can see the Add Cards wizard that comes up with the ability to add individual cards with a card search funcion. To the left of that are 3 tabs. If you click on the second tab down, you can copy/paste your inventory list into that box and it will import all the cards it recognizes and if it doesn't recognize a card it will let you know and you can fix the spelling or whatever and then re-import those particular cards.
As far as the Export goes. Again, go to your inventory, sort the cards how you would like with the filters, and then if you click the VIEW link at the top and you will see that one of the options is Print. Select that, a new window will open with all the cards in the order that you had them in and you can copy/paste that into whatever program you want to further sort and or just print it from there.