Toadinthehole, thank you for your comments. I have to disagree with some of them, though.
1 If stating, clearly, (if wrongly) and with no room for negotiation, that an iScotland could not use the pound isn't "prenegotiation", what is it?
2 The polls do still show a majority "no", but this is no cause for complacency. The polls also show movement is towards "yes", and there are months to go yet.
3 Granted, but wtf was a civil servant doing opening his gob in the first plae? Absolutely against protocol.
4 The Treasury have agreed that rUK will take responsibility for the whole of the debt, they have no alternative, as it was they who issued the gilts and the Scottish Gvt have no borrowing powers at present. However, your assertion that iScot would have no assets is jawdropping! You do know we too pay taxes, and have done for the past 300 years? We already own circa 10% of BoE, of every piece of military equipment, of international embassies, even of the London sewerage system!
5 I'm happy to take your word on that.
6 When we vote yes, there wll be no need for bitterness from us. We're a forgiving lot. :)
7 The tactic has already backfired. Yes gains new converts every time a Tory opens his mouth, and Alexander and Balls haven't made the situation any easier.
A currency union is in the best interests of everyone, including rUK. But there are alternatives, it's not the be-all and end-all.