SLG

Usually hosts dont deal out IP bans for nothing......

but using a proxy, you should be able to go on the sites,
All you need is to find a proxy and put it in your internet settings,
if you have broadband and use ie, this can be found by clicking on
tools-->internet options-->Connections-->Lan settings-->Use a proxy server.

Im not sure where you can find a site that will teach you more about proxies..