Having spoken with Ford, again, this week about 2007 MY changes, they still don't know and won't know for definate for about 2 weeks to a month, it's strange because some manufacturers have their next model years on sale in july/aug!
What they have said is that it's likely to just be some interior changes - but who knows.
As for what a model year is, every year most car's have minor or major overhall's - new colours, trim, options and standard features, even new engines and the model year changeover is when these features often get introduced to add consistancy and to group revisions together to make it seem more worthwhile buying - rather than adding a paint choice in feb, a new sat nav in march, a revised front grille in apri etc.
M