My HD
I got HD going several weeks ago on my new Sceptre 42" LCD, it's nice.
I have a pretty bad deal with Comcast Digital HD - the package is an old one from before it was Comcast, around $100/month for most channels.
It has about 10 or 12 HD, including some network, Discovery, and one HBO.
The HD DVR is nice. If I want to make any changes to the channels, they toss out the package and it costs more.
One slight advantage - since I also use Comcast cable modem, they have a free upgrade to 6.0 speed on that.
I should get around to switching to Dish - I think it has more channels, perhaps a better picture, cheaper.