I still think that even if the Scottish independence movement manages to win the hearts of all Scots that are currently undecided, it will still eventually get 47-49% of the votes at best, like the Quebec independence movement at a similar referendum in 1995.
Quebec is a bit different from Scotland. Quebec basically wants all the benefits of being an independant country, while still retaining all the benefits of being a canadian provence. At least that's how it was explained to me while I was in canada.
Quebec pretends to support independence, but most are basically full of bluster. They realized a while ago that if they pretend they're going to leave, they can extort the other provinces that actually make money in order to get special subsidies, exemption from Federal policies, disproportionate benefits from Federal policies, and so on. If they left, the biggest annoyance would be figuring out how to keep the Maritime provinces from getting screwed by nonsense like Quebecois tariffs or Quebecois tolls on "foreign" transportation.
From the Quebec side, it'd also be rather amusing to see them suddenly have a bout of separatism on its own, as certain First Nations and Anglo-Canadians of Quebec have little desire to join them in independence (which I'm sure everyone already knows; they've made their opinions on that quite vocally). The Maritimes could also deal with it in part by going through the United States - most US-Canadian trade is duty-free, and was even before NAFTA.
EDIT:
Oh, say, while we're all talking about secession and devolution in Quebec and Scotland, has anyone thoughts on the big fuss in Spain over the planned Catalan referendums? It's really interesting to see it in contrast to the Scottish referendums; London lets Scotland go on with it with a minimum of trouble, while Madrid screams bloody murder, threatens Catalonia with being forced to go through the EU processes again (and by extension Scotland, because Scottish accession on the grounds of the United Kingdom's entry sets a terrible precedent for Catalonia; this position is also officially supported by Brussels), and considers the planned referendums illegal and has warned that it will block any attempt at them.