I think I'm gonna vote for AV - it just seems like a slight step towards a fairer system although obviously there are pros and cons of both sides. The negativity of the "no" campaign - ok it's a campaign saying no, it's gonna be negative but they are not making the case for any advantages of FPTP as far as I can see - which has incorporated downright lies has made me even more certain. Not that the "yes" campaign has been that much more positive.
Also, I'm surprised how explicit a number of people (eg Prescott I think) have been in saying "I'm voting for/against because it will increase/decrease the number of votes that I expect my party to get" - what the fuck has that got to do with electoral reform and the good of the country?
Presumably, though, that's why the BNP are voting against which gives the lie to most people's fear that AV will improve their chances. Actually, it doesn't really, they've probably just done their sums wrong because they haven't got any actual statisticians.
One thing I'm confused about is how many times I've read things saying "if we'd had AV then we would have had the same result in x% of elections" or suchlike - that's assuming that people would have voted the same if we'd had AV at the time, maybe they wouldn't have done.