I would love to have a WoW Addon that when I bring up the guild list, I can see (could be a color change or spcial icon or something) that a character has been uploaded to the website. Before I start WoW, UU would download the data from the website as to who is logged in, then when I look at the guild list, it would show me who has uploaded and who has not.

Of course, I think that this UIMod would need to be able to tell servers, guilds and factions apart so you could have more then one guild on the same server or work with multiple servers with the same guild name.