Let the hive mind of Engadget get that for you.
"I need help! I want a small pocket camcorder but I'm not sure which one to get. I don't want to fall into the hype of the Flip because I worry two hours won't be enough. What should I be looking for when considering a small camcorder and where can I get a good quality one with expandable memory? Thanks!"
This is happening nationwide. The "PBS HD Channel" feed is being dropped by more and more stations and replaced with an HD simulcast of the regular PBS feed (so, HD if they have a particular show in HD, SD if they don't, just like the other networks. It happened to WGBH (Boston) a few months ago.
According to current.org (back in February):
http://www.current.org/dtv/dtv0802hd.shtml
"The PBS Board endorsed the plan last week, reallocating satellite capacity for the fall and discontinuing the original HD Channel, a loop of eye-candy video used to demonstrate the great looks of high-def."
which sounds as though the PBS HD Channel is not long for this world in any case. The same article does indicate that more and more shows will be produced in HD going forward, so stations will probably be able to weather the storms of viewer outrage.