Canon's newest DVD camcorder, the DC22, uses 3" DVD-R/-RW dual layer discs,
and unlike the double sided discs used by the DC20, which the DC22 replaces,
they do not have to be turned over.
The following is from the DC22 "Features" page on the Canon website.
"Imagine capturing every moment of your child's school play or concert without
having to worry about changing the disc in the middle of the action. It's all
thanks to the DC22's Dual Layer Recording System, which uses 3" DVD-R/-RW dual
layer discs to record almost double the time (XP=36 mins / SP=54 mins /LP=108
mins). From curtain rise to curtain call, the DC22 puts extended recording
power right into the palm of your hand."
The DC22, just announced on August 1, 2006, can also use 3" DVD-R/-RW single
layer discs. You can read more about it on this Canon web page.
If you need any clarification, please feel free to ask.
Went to the Canon website and from there, their "New Product Zone."
Looking Forward, denco-ga - Google Answers Researcher