Usb to 3g Datacard lead??

I have been trying to locate any one who knows where i can obtain the above lead. As you all may be aware vodaphone has brought out a 3g Data card compatible for the mac, the only problem is and it is a big problem it will not connect to most powerbooks and all the new macbooks, how good is that, I have tracked down several companies that are beta testing such a connetctor but cannot find a company that is actually selling one. There is some great deals on The 3g Data cards and it is incredible that i cannot connect my laptop through a 3G datacard, What a joke.

can anyone help!!!

cheers
'pete