I assumed "lots" meant many, if not most, of these from the Mar 18 press release:
"Upcoming national HD announcements may include the addition of
ABC Family HD
AMC HD
BET HD
The Biography Channel HD
Bravo HD
Cartoon Network HD
CMT HD
CNN HD
Disney Channel HD
ESPN News HD
HBO2 HD
IFC HD
MGM HD
MoreMAX HD
MTV HD
Nickelodeon HD
Sci-Fi HD
Smithsonian Channel HD
Starz Edge HD
Tennis Channel HD
Superstation WGN HD
The Weather Channel HD
Toon Disney HD
USA Network HD
VH-1 HD"
It really looks like DirectTV put a bee in Dish Network's bonnet with that ad showing well-known channels not on Dish... Including the 3 in the above list that are already launched. Incidentally, 3 transponders X 7 channels apiece = 21 + 3 already on = 24 new national HD channels. Oops. 25 in the above list.