Often times you'll have the same problem on an Android tablet. They have Flash, which will let you access more, but there are a lot of issues with regard to media rights going on with tablets right now. Basically, the intellectual property holders are arguing that it's a new area and are demanding more money for their content to be accessed on a tablet, resulting in tablets in general being blocked off from a lot. I read a lot about people having this issue with the TouchPads. Fortunately, they allow you to adjust your settings to tell the server you're using a desktop browser and that fixes everything.