My tuning adapter on my TiVo stopped responding today, so I rebooted it. When it came back, the channel map that Spectrum (Time Warner Cable) is currently sending to it includes an epic amount of new HD channels. Now, keep in mind that none of these appear to actually be active at this time - they're only in the channel map, not actually live channels.
1105 - Teen Nick HD
1108 - Sprout HD
1110 - Disney Jr HD
1137 - AHC HD
1176 - HSN HD
1179 - QVC Plus HD
1210 - Ovation HD
1218 - WGN America HD
1226 - FamilyNet HD
1227 - Logo HD
1229 - RFD HD
1230 - POP HD
1251 - MTV2 HD
1255 - GAC HD
1256 - Centric HD
1257 - UP HD
1266 - AXS HD
1275 - REELZ HD
1279 - FXM HD
1285 - HDNet
1287 - Indieplex
1288 - Retroplex HD
1314 - SPECSHD (not sure what this is)
1315 - TVG HD
1328 - Fox Sports 2
1334 - Big 10 2 HD
1345 - Pac 12 HD
1356 - Bloomberg HD
1359 - CSPAN HD
1360 - CSPAN 2 HD
1361 - CSPAN 3 HD
1362 - BBC World HD
1385 - EWTN HD
1387 - INSP HD
1389 - Daystar HD
1393 - Pac 12 LA HD
1394 - Pac 12 AZ HD
1395 - Pac 12 WA HD
1396 - Pac 12 OR HD
1397 - Pac 12 Mountain HD
1398 - Pac 12 Bay Area HD
1608 - HBO Zone HD
1609 - HBO Latino HD
1625 - ThrillerMAX HD
1626 - OuterMAX HD
1627 - MAXLatino HD
1628 - 5StarMAX HD
1629 - MovieMAX HD
1646 - Showtime Beyond HD
1647 - ShoNEXT HD
1648 - ShoWOMEN HD
1663 - The Movie Channel Xtra HD
1706 - Playboy TV HD
1105 - Teen Nick HD
1108 - Sprout HD
1110 - Disney Jr HD
1137 - AHC HD
1176 - HSN HD
1179 - QVC Plus HD
1210 - Ovation HD
1218 - WGN America HD
1226 - FamilyNet HD
1227 - Logo HD
1229 - RFD HD
1230 - POP HD
1251 - MTV2 HD
1255 - GAC HD
1256 - Centric HD
1257 - UP HD
1266 - AXS HD
1275 - REELZ HD
1279 - FXM HD
1285 - HDNet
1287 - Indieplex
1288 - Retroplex HD
1314 - SPECSHD (not sure what this is)
1315 - TVG HD
1328 - Fox Sports 2
1334 - Big 10 2 HD
1345 - Pac 12 HD
1356 - Bloomberg HD
1359 - CSPAN HD
1360 - CSPAN 2 HD
1361 - CSPAN 3 HD
1362 - BBC World HD
1385 - EWTN HD
1387 - INSP HD
1389 - Daystar HD
1393 - Pac 12 LA HD
1394 - Pac 12 AZ HD
1395 - Pac 12 WA HD
1396 - Pac 12 OR HD
1397 - Pac 12 Mountain HD
1398 - Pac 12 Bay Area HD
1608 - HBO Zone HD
1609 - HBO Latino HD
1625 - ThrillerMAX HD
1626 - OuterMAX HD
1627 - MAXLatino HD
1628 - 5StarMAX HD
1629 - MovieMAX HD
1646 - Showtime Beyond HD
1647 - ShoNEXT HD
1648 - ShoWOMEN HD
1663 - The Movie Channel Xtra HD
1706 - Playboy TV HD