The problem when you look at broadband worldwide is that each country tends to be judged by the fastest service that you can get there. Yes, Canada and the USA may have some very fast broadband but it is not available to everyone in those countries. Many users can get nothing more than dial-up or sub 512k broadband. Cost of broadband that people regularly quote from elsewhere is often based on special introductory rates which are not representative of normal rates. Canada has one of the highest broadband usages in the World, although they regard broadband as anything other than dial-up so 64k would be classed as broadband there. Details of Canadian ISPs can be found at
http://www.thelist.com/misc/canada/
I think that part of the problem with things in the UK is that the Government want to milk as much as they can from issuing licences for the supply of services. Just look at the £ billions that 3G licences were going for. If Government had financially aided development of technology instead of making a profit from it we could have had significantly better and cheaper services.