The HD channel for Disney Channel on comcast is 244
Disney Jr is not available in HD yet on Comcast
879
Channel 879 on HD
259
807
It is 188, I'm not sure for HD
Comcast in Nashville, Tennessee broadcasts the SEC Channel on 718 SD and 1738 HD.
Nickelodeon, which is 679 (HD) 40 (non-HD)
3 for normal 703 for HD
Hub is on channel 130. The HD version is on channel 934.
If you have comcast it's on channel 34(925 in hd).