You can use any HDV camera to make video.
I use Canon HV20 for example. It costs under $1000.
It works quite good for a "consumer" level HD camera.
I managed to make some good video with it using tripod if
sunlight is good enough.
I transfer video to PC deinterlace and resize to format 1280x720p
than usually encode video using Windows Media Pro encoder or QuickTime Pro.
How about sharing HD video clips on a Web ?
Web is becoming increasingly fast and soon exchanging HD video files will be real.
You do not believe it is possible?
See new web site for HD video clip sharing
http://www.homehdvideo.com/
A common video format on this site is 1280x720p WindowsMedia or QuickTime
At a bit rate about 3 MBits video looks quite decently.
You can even upload you HD video clip there if you follow instructions.