I love the clean design. Focus on the functionality, branding below, concise explanations of what's what. Thumbs up! :-) You may want to explain the files are

I love the clean design. Focus on the functionality, branding below, concise explanations of what's what. Thumbs up! :-) You may want to explain the files aren't uploaded to server -- that they never leave the computer (security); you may also warn upon exceeding 32KB size (IE8 limit).