another feature I would like to see built into the wallet is a "proof of existence" feature
like this page offers for bitcoin
http://www.proofofexistence.com/it should be easy to build
it would need one menu item that lets you select a file to place the hash of it in a transaction comment in the blockchain and another which also lets you select a file to search the blockchain for the hash of that file and displays the date and time for that block