As it stands at the moment, it is Claude: 1 - Squirrel: 0 thanks to a rather explosive mix of Cayenne and Hot Chilli powder mixed with Vaseline and white pepper, and a Prodigy CD on full-pelt!
There is a gismo you can get (high frequency)that deals with all this sort of pest thing. I can recommend it but not sure about effectiveness on neighbours!
The Vaseline makes the curry mix stick to the fur better! We do have one of the ultrasound contraptions, which we keep running whilst at work. It takes a couple of days to have an effect, but has proven to be a useful tool in my ongoing fight.