WAR Renown Rank is a plugin that will show a WAR character's renown rank progress.
Once installed, you can specify the title, character ID (by searching for your character at http://realmwar.warhammeronline.com) and select the server your character is on. Once that is done, the magic is complete. :)
The widget will display your character's name, as a link to the character page at the Realm War site, how much renown your character currently has, how much renown your character needs to rank up, as well as a nice progress bar to show how far along your character is in their current rank.