Just an FYI, tonight's Dallas Stars game is one of those being shifted over to the (non-HD in some cases) alternate channel. Here is a full listing:
AT&T U-Verse - Ch. 756 (1755 HD)
Charter Cable - Ch. 300
DirecTV - Ch. 677 (677-1 HD)
Dish Network - Ch. 441 (9579 HD)
Time Warner Cable - Ch. 960
Verizon FIOS - Ch. 77 (577 HD)
ESPN Dallas' Mark Stepneski has the list of future games that will be bumped over here.