[David Cherniack] "Space in such a timeline is not a negative gap object. It is simply space, the absence of an object."
I've mentioned this before but Media Composer in fact has always treated what you are calling "space" as gaps, so this isn't something radically new in FCPX.
In MC you can make cuts in the gaps (AVID call it "filler"), you can add effects to them (very useful for effects that apply to a whole timeline like crops etc.), you can edit gaps into the timeline to shift other stuff out of the way, you can even accidentally move with them the Segment tool and overwrite other clips. Generally it's a pretty useful way of working tnhat doesn't feel at all counter-intuitive - so if legions of traditional editors can cope with it in MC, why not in FCPX?
I'm not at all sure that gaps are really that much of an issue - which is not to say that there aren't other issues.
Simon Ubsdell
Director/Editor/Writer
http://www.tokyo-uk.com 
