Curiosity of national proportions

[VNA]

Examples are:
Border control is the obvious one - with different Governments it will become an issue. 
Armed forces,
air traffic control,
utilities and infrastructure (national rail? The separation committee would draw lots to see who gets encumbered!),
Sea boundaries,
international territory boundaries,
all the organisations across the world that will need to change their systems to recognise a new country.

There's some detail to work out, but there's no real big issues there.  It's the same right across Europe.

Don't want to be inflammatory here but how many other countries do you think will want to trade with an independent Scotland that only has self interests at heart and won't help with international peace keeping?

By International Peace Keeping, do you mean Afghanistan, Iraq and Libya?  Such opportunistic , unrealistic and immoral imperialist intervention projects are not things I could see Scotland being involved with in in the future.  Help with UN peace keeping duties, I'm sure we would.  And I'd imagine most of the world will be more than happy to to business with Scotland.  They might not be so keen to do business with us in the future if they see us hesitate and lack self confidence come autumn 2014.  Many countries round the globe are expecting Scottish Independence.  They won't understand if we don't grasp that opportunity.