The category of professional editing systems was once dominated by one player - Avid.  Today, it's a war between Avid and Apple's platform with new entrants nibbling away at the edges --  Sony and Adobe.  For those looking to do some basic editing for home videos or postings on the web Avid's VideoSpin is worth a look, it's free and it contains someof the features found in Avid's Pinnacle editing system.  iMovie and Blender also have offerings.  Here's a link to more info on editing software....

http://labnol.blogspot.com/2007/01/free-video-editing-software-for.html

 What's interesting about Apple's platform is that the company is making huge inroads in the edit space yet many experts say the real end game is about box (computer) sales not the software.