The plugin will add a button to the visual editor to run the iTunes Link Generator and offers link masking to hide your affiliate junk.
Initial screen upon clicking the button, showing previously clicked links sorted with most recent at the top
After clicking the Manual URL link, the input box swaps to an entry for iTunes store URL's
Showing the screen after searching
Showing the screen after clicking a link inside the search or history results
The end result how it looks in the editor (if you don't have any text selected)