Apire HD is One of the cleanest themes I have ever seen for the iPad. This theme has great all around modifications to the iPad operating system. This theme modifies all aspics of the iPhone operating system. It has custom modifications made to the iPod player, calendar, message app, lcokscreen, home screen, multitasking, bar and many more. It also has an auto skin for every app icon on your iPad. Also included is color keyboard mod. This theme is also available for iPhone iPod Touch. The theme can be picked up for $2.50 in the ModMyi Repo and is definitely worth the money.
The theme designer @FlybriTn is a part of BadGbTeam.