When will we see more HD channels?

[Mactel]

For a while there they were popping up. The major networks, HDnet, PBS, Discovery, ESPN, NFL. It's been a while since I've seen a new HD channel.

I specifically want Sci-Fi in HD for BSG!

I saw an episode of Enterprise on HDnet and it looked fabulous. It's a shame that series started so slow and then got good the last season when it was cancelled.

P.S. Any of you with HD notice that the new Nano commercial is in HD. Sweet!