wibbly,
There's an extremely good website belonging to a gyro pilot called Mel Morris Jones. I don't remember the address, but if you go to
www.flyer.co.uk and look at their links, the gyro link should take you to his website.
I had a couple of trial lessons in Carlisle, and they are great fun. Only problems are they're very noisy so some airfields don't like you keeping them there, and I personally wouldn't trust something with that many moving parts to my own or anyone else's self build skills - show me a factory made one and I might buy it. At a CAA safety evening recently, the chap giving it said the small total number of gyro pilots meant the accident numbers probably weren't statistically significant, and I tend to agree. I don't think I'd worry too much about the safety aspects; a lot of accidents were in earlier days when they weren't well regulated. Get a good instructor and be careful and you've probably as good a chance of surviving as the rest of us - at least us R22 pilots.