AFAIK, the only place outside the UK where Scottish independence could change things quickly is the Basque country. Catalonia just got its spanking new Autonomy Statute (25-year revision) and the election once again resulted in a left (as opposed to nationalist) government. The Basque Country seems to be holding off on the Statute and holding its breath on ETA, and has elections coming up soon, plus it does have a bare nationalist majority and a nationalist minority government. Batasuna could get a big electoral boost if it became legal, the peace process didn't break down and Scotand became independent.
In the medium term (2 election cycles) we might see the UK breaking up and the EU question being posed forcefully in England.
But thinking of domino effects beyond that is a little far fetched at this point. Those whom the Gods wish to destroy They first make mad. -- Euripides
But the breakup of Yugoslavia did not have a domino effect on the rest of Europe. Those whom the Gods wish to destroy They first make mad. -- Euripides