It's actually 38 HD channels being added since we already got HD PPV, NBA HD and NFLRD HD, and the HD On Demand link doesn't count. That would put us at 80 HD channels (42 currently). We would still have a decent amount of room though, so it looks like the second wave could be bigger.

Note: The limited basic HD channels (current ones that are moving and new ones being added) are going to be added on or about 10/28.