3mobile are offering various pay as you go packages for about £100, you buy a gadget a bit like a memory stick which plugs into a USB port and apparently away you go - are they are worth it. for example what is a sufficient 'speed' for me, I am a light internet user, mainly for surfuing, nothing hectic, but would like iTunes. Id rather not pay rental etc as I dont use it often. Do you need a phone port/line? Advice please.