I would say WGN America HD, MSNBC HD, Lifetime HD, TVOne HD, MTV2 HD, ESPN-U HD, TeenNick HD, E! HD, TV Guide Network HD, BBC America HD, Lifetime Movie Network HD, Nick Jr. HD, Hallmark Channel HD, even west coast feeds of Nickelodeon HD, Cartoon Network HD, and Disney Channel HD.
For the channels that D* doesn't have, American Life Network, Hallmark Movie Channel HD, and for the locals WNEG-TV 32 (Independent).
For the locals they don't have in HD, WNTV 29 (PBS/South Carolina ETV) and WMYA 40 (MyNetworkTV), it would be nice to see WWE FRIDAY NIGHT SMACKDOWN in HD in GSP.