For content, I've got a D-VHS VCR so I can buy movies (although only about 40) in 1080i resolution. I also plan on installing an antenna and getting OTA HD from local channels. I use Cox as a cable provider, and when they start offering an HD PVR (Tivo type device) which I'm told with be the Scientific Atlanta 8000HD, I'll probably sign up for HD service. So far their HD channel selection is pretty slim. For now, I'll just use the OTA to get local programming and my D-VHS VCR for time-shifting shows.
I considered Direct TV and Dish Networking, and I was ready to give Dish my credit card number but then they said their HD PVR was backordered and they couldn't promise me a time I told them no way. I'm glad I did as I've been reading that most people are sending their 921s back very unhappy.
Voom has a lot of HD channels, but not many I care about. It's like they are more interested in just getting HD signals than trying to find good content. I'm not going to watch a program just because it's HD, I expect I will watch all the stuff I do now, but when it is in HD, enjoy it more.