With the price of oil dropping, the only benefit to an independent Scotland would be gone. The impression I get is that the Scots are a bunch of radical Leftists and the UK would be well off without them. The corollary, though, is that they'd run their country into the ground within 2 years and someone (read: the UK) would have to pick up the pieces. Though one would have to ask if Northern Ireland would be under pressure in the case of an EU exit by the UK.

Of course, the entire EU is straining right now. The smartest people I've heard speak on the subject don't seem to think the EU will survive in its current form - it's going to end up having to be reduced to a glorified customs union. Forget the euro, too. Anti-EU parties are gaining ground in virtually every member state and the pressure will become too great to maintain the EU because it's not the United States of Europe.