Maybe I'm naive, but it seems like as long as DishN continues to advertise "over 100 channels available now, up to 150 channels by the end of the year" there is a pretty good chance that more channels will be added by the end of the year. That is the clear implication.
Its easy to say Charlie says whatever he wants in advertisements, but continuing this promotion this late in the year is pretty much a promise that new national HD is coming before the end of the year.
If Charlie knew it didn't have a reasonable chance of getting close to 150 by the end of the year and continued to run this ad, I think it would open itself up to a class action by subscribers. E* is a public company and there are pretty significant laws against misleading statements. DishN can't just say whatever it wants. It has to be reasonably honest. Consequently, I think that even though "up to" is definately wishywashy (a great technical term), Charlie could only keep this ad campaign going if it had some pretty specific plans for new HD before the end of the year.