UPDATE: After installing three mobile on Fedora 11 I noticed that the DNS servers had changed. The new one are as follows
DNS Server: 188.8.131.52,184.108.40.206
One thing that I forgot to mention in my previous post about setting up mobile broadband on Fedora 11 is that three do not always set the correct DNS servers. This was annoying as it would appear that the connection was working however any attempt to access a website would timeout. In order to do so edit the connection via NetworkManager and add in the follow DNS server in the IPv4 tab.
DNS Server: 172.31.76.69, 172.31.140.69
The server addresses are comma seperated so you can add DNS server of your choice. I have used the DNS servers that Three normally set up you can use OpenDNS.