Manual Transfer of Items to friends.
I realize that drop-downs are coded into the game, a thought on the current send resources window. instead of having 100, 500 and so on. Have the default be what the player enters (a text field) so that you can quickly send large amounts of items to friends. I realize this is simply preference but with the gold decay rate of the game, you often lose alot of money when transferring gold to a friend, and they in turn loose even more while waiting to receive the full amounts. 10 x 10000 looses about 2000 gold simply due to the time it takes to send multiple packages, in addition its more work for the server to keep up with thousands of packages being sent constantly instead of 1 package for the total amount.
Just a suggestion.