Record and edit two videos at same time
There are several ways of doing this... really depends on the cameras you are shooting on &amp; budget.  On set we sometimes use a piece of software called Qtake, which can record two video feeds from an HDSDI source, and play them back immediately, but it's really pricey.  Other ways to do it would be to use a HDSDI trigger to set both devices in to record mode.  Another way is to just make sure your TimeCode is in sync. What cameras are you planning on using?  If you are using Canon 5DII/7D's etc you could use the magiclantern hack and get a trigger record going, see the link below, then the files would correspond and sync up pretty well by the looks.

http://www.magiclantern.fm/forum/index.php?topic=1088.0