Hagerty Insurance - http://www.hagerty.com
A great company - their prices & support are great - if you need insurance for your classic - check them out.
UPDATE 2007: Got my renewal for the insurance on the roverhaul fleet and was suprised to see that it was over $100 more then last few years. Apparently they now have a surcharge for anyone under 30 years of age with no exceptions. They've been the only insurance company I've used for the roverhaul vehicles & now without ever filing a claim & praising them on this site and to others in need of collectors insurance, they're raising my rates. It's not the money so much as the point of the whole thing. They've tried to work out a solution, I'll be 30 soon, but I still just don't like it.